Scientific inquiry, a relentless pursuit of understanding the intricate workings of our universe, relies heavily on the bedrock of constants—those unchanging, immutable values that serve as the foundation upon which experiments are built. Within this expansive realm of constants, both physical and mathematical, a unique subset bears the distinct mark of being named after individuals, creating a captivating interplay between the objective laws of nature and the subjective contributions of human intellect. These constants, aptly termed eponymous, weave a narrative that transcends mere numerical values, entwining the names of trailblazing scientists with the very fabric of scientific discourse. In this article, I am going to share a list of constants in science or scientific constants for your convenience.

In the symphony of scientific exploration, eponymous constants emerge as both the notes and the composers, shaping the narrative of human inquiry into the mysteries of the universe. As the experiment unfolds, these constants stand as silent witnesses to the ebb and flow of discovery, their names echoing through the corridors of laboratories and lecture halls, ensuring that the human element remains an integral part of the ever-evolving scientific narrative. You may also like to read the scientific phenomena in everyday life named after people.

The catalog of eponymous constants reads like a roll call of intellectual giants, each entry immortalizing a luminary in the annals of scientific achievement. From the gravitational constant “G” honoring Sir Isaac Newton to the Planck constant “h” paying homage to Max Planck, these symbols not only encapsulate the essence of the principles they represent but also serve as symbolic bridges connecting the present endeavors with the profound insights of the past. The significance of such constants extends beyond their utilitarian role in experiments; they become conduits through which the spirit of scientific inquiry flows across generations, fostering a continuum of discovery.

## Constants in science or scientific constants

The interplay between eponymous constants and scientific citations introduces a fascinating dimension to scholarly discourse. Beyond the laboratory bench, these constants influence the very fabric of academic dialogue, with references to specific constants serving as nods to the intellectual lineage that underpins scientific thought. Scholars engage in a nuanced dance, citing not only the empirical findings but also the enduring legacies of those who have left their indelible mark on the scientific landscape. This dynamic relationship between constants and citations serves as a testament to the interconnected nature of knowledge, where numerical values and human narratives converge in a symphony of intellectual exploration.

The discourse surrounding eponymous constants delves into the intricate web of influence, where the mere mention of a symbol can evoke a rich tapestry of scientific history. Scholars and researchers, cognizant of the weight carried by these namesake constants, navigate the intricate maze of attribution and acknowledgment. The literature resonates with discussions on how these constants, imbued with the intellectual DNA of their namesakes, shape the trajectory of experiments, guide the formulation of hypotheses, and inspire future generations to embark on their quests for understanding. Let’s find below a list of Constants in science or scientific constants

### 1. Apéry’s Constant – Roger Apéry

In the enigmatic realm of mathematical constants, one encounters the beguiling Apéry’s constant, an elusive and transcendental number championed by the French mathematician Roger Apéry. With an aura of mathematical mystique, this constant, denoted by ζ(3), is a solution to the famous Basel problem, revealing its intimate connection to the zeta function. The Basel problem, initially posed by Pietro Mengoli in 1650, sought the sum of the reciprocals of the squares of natural numbers. It was Apéry who, in 1978, astoundingly proved that ζ(3) is irrational, defying conventional expectations. The pursuit of Apéry’s constant navigates through the intricate landscapes of number theory and mathematical elegance, leaving mathematicians marveling at its inherent beauty and the mysteries it continues to unfold.

### 2. Archimedes’ Constant (π, Pi) – Archimedes

Embark upon a historical odyssey through the annals of ancient mathematics, and one encounters the enduring legacy of Archimedes’ constant, famously known as π, or pi. Attributed to the unparalleled intellect of the ancient Greek mathematician Archimedes, π represents the ratio of a circle’s circumference to its diameter. This fundamental constant has transcended millennia, finding its origins in Archimedes’ meticulous geometric insights. Beyond its intrinsic geometric significance, pi permeates diverse branches of mathematics and science, becoming an indispensable tool for calculations in areas as varied as physics, engineering, and statistics. The transcendental nature of pi, an irrational number with infinite non-repeating decimals, imparts an eternal fascination, as mathematicians continue to unravel its properties and applications in the ever-evolving tapestry of human knowledge.

### 3. Avogadro Number – Amedeo Avogadro

Dive into the realm of chemistry, and the Avogadro number emerges as a cornerstone in understanding the microscopic world of atoms and molecules. Named in honor of the Italian scientist Amedeo Avogadro, this fundamental constant denotes the number of atoms, ions, or molecules in one mole of a substance. Avogadro’s visionary insight, articulated in the early 19th century, provided a bridge between the macroscopic and microscopic realms, paving the way for the development of the mole concept in chemistry. With meticulous experimental and theoretical groundwork, Avogadro’s number, approximately 6.022 x 10^23, has become a linchpin in chemical calculations, underpinning the quantitative foundations of the molecular sciences. A testament to Avogadro’s enduring legacy, this constant embodies the marriage of theory and experimentation, shaping the very fabric of modern chemistry.

### 4. Balmer’s Constant – Johann Jakob Balmer

In the symphony of spectroscopy, the notes played by Balmer’s constant compose a harmonious melody, echoing the contributions of Swiss mathematician Johann Jakob Balmer. Stepping onto the stage of atomic physics in the late 19th century, Balmer unraveled the spectral lines of hydrogen, laying the groundwork for the emerging field of quantum mechanics. Balmer’s constant, encapsulated in the Balmer series, elucidates the wavelengths of the visible lines in the hydrogen spectrum, providing a key to the understanding of atomic structure. Through a delicate dance of experimentation and mathematical finesse, Balmer’s constant became a precursor to the broader realm of spectral analysis, influencing the subsequent development of quantum theory. Balmer’s enduring impact on the scientific landscape resonates through the lens of spectroscopy, where his constant remains a foundational piece in deciphering the secrets of the atomic orchestra.

### 5. Belphegor’s Prime – Belphegor (Demon)

In the shadowy recesses of number theory emerges Belphegor’s prime, a cryptic numerical construct named after the demon Belphegor, a figure deeply rooted in myth and folklore. This prime number, denoted as 1 followed by thirteen zeros, followed by 666, followed by another thirteen zeros, and a final 1, possesses a diabolical symmetry that tantalizes mathematicians and enthusiasts alike. Conceived as a concatenation of demonic elements and mathematical precision, Belphegor’s prime stands as an enigmatic testament to the intriguing intersection of superstition and mathematics. The very essence of this prime number embodies a mystique that beckons those daring enough to explore the cryptic corridors where number theory and folklore intertwine.

### 6. Bohr Magnetron – Niels Bohr

In the quantum tapestry woven by Niels Bohr, the Bohr magneton emerges as a fundamental thread, delineating the magnetic properties of electrons within atoms. Conceived during the transformative era of early quantum mechanics, the Bohr magneton, symbolized by the Greek letter μ sub B, serves as a measure of the intrinsic magnetic moment associated with an electron’s orbital angular momentum. Niels Bohr, the Danish physicist, intricately wove this magnetic constant into his model of the atom, providing a key to understanding the quantization of angular momentum. The Bohr magneton, a nexus between classical and quantum realms, guides physicists in comprehending the magnetic dance of electrons, enriching our comprehension of atomic behavior and laying a cornerstone in the edifice of quantum theory.

### 7. Bohr Radius – Niels Bohr

As one delves into the atomic realm, the Bohr radius unveils itself as a pivotal concept in Niels Bohr’s revolutionary atomic model. This characteristic length scale, symbolized by ‘a₀,’ delineates the average distance between an electron and the nucleus in a hydrogen atom. Bohr’s audacious model, introduced in the early 20th century, marked a departure from classical notions, incorporating quantized angular momentum and discrete electron orbits. The Bohr radius, a manifestation of this model, captures the delicate equilibrium between the centripetal force and the electrostatic force in the microscopic ballet of electrons around the nucleus. In this dance of forces, the Bohr radius emerges as a poetic measurement, encapsulating the stability inherent in the dance of charged particles, and forever engraving Niels Bohr’s indelible mark on the evolution of atomic theory.

### 8. Boltzmann Constant – Ludwig Boltzmann

In the expansive landscape of statistical mechanics, Ludwig Boltzmann’s legacy is immortalized in the Boltzmann constant, a keystone bridging microscopic chaos and macroscopic order. Denoted by ‘k,’ this constant weaves itself into the fabric of the Boltzmann distribution, relating temperature to the average kinetic energy of particles in a gas. Boltzmann, a visionary Austrian physicist, championed the statistical interpretation of thermodynamics, imparting statistical significance to entropy and temperature. The Boltzmann constant, with its precise numerical value of approximately 1.380649 x 10^-23 joules per kelvin, serves as a bridge between the abstract realm of statistical ensembles and the tangible macroscopic world, offering profound insights into the probabilistic nature of physical systems. In the symphony of thermodynamics, the Boltzmann constant conducts the harmonious interplay of randomness and order, echoing the genius of Ludwig Boltzmann.

### 9. Brun’s Constant – Viggo Brun

Enter the labyrinthine world of number theory, and the elusive Brun’s constant emerges as a mathematical enigma, a testament to the profound inquiries of the Norwegian mathematician Viggo Brun. Symbolized by the letter ‘B,’ this constant is intricately linked to the distribution of twin primes, those beguiling pairs separated by a solitary even number. Brun’s constant encapsulates the essence of the Twin Prime Conjecture, reflecting the scarcity of these prime pairs as one traverses the infinite expanse of natural numbers. The pursuit of Brun’s constant unfolds as a delicate dance between the infinitude of primes and the elusive nature of twin primes, inviting mathematicians into a realm where the beauty of number theory intertwines with the challenges of unresolved conjectures.

### 10. Cabibbo Angle – Nicola Cabibbo

In the symphony of particle physics, the Cabibbo angle resonates as a fundamental chord, harmonizing the dance of quarks within the enigmatic world of elementary particles. Named in honor of the Italian physicist Nicola Cabibbo, this unitary matrix element governs the mixing of different generations of quarks, providing a key to understanding weak interactions. The Cabibbo angle, encapsulated in the Cabibbo-Kobayashi-Maskawa matrix, weaves together the intricate relationships between quark flavors, opening a window into the subtle dynamics of particle interactions. Nicola Cabibbo’s profound contribution to the Standard Model of particle physics reverberates through the precise articulation of this angle, enriching our comprehension of the underlying symmetries and interplays within the subatomic realm.

### 11. Chaitin’s Constant – Gregory Chaitin

In the ethereal landscapes of algorithmic information theory, Gregory Chaitin’s constant, denoted as Omega (Ω), emerges as a symbol of incompleteness and unpredictability. Chaitin, an American-Argentine mathematician and computer scientist, introduced this constant as the halting probability of a universal Turing machine. Ω signifies the probability that a randomly generated program, of a specified length, will halt when executed by a universal Turing machine. The profound implication of Chaitin’s constant lies in its uncomputable nature, echoing Gödel’s incompleteness theorems and ushering in a realm of mathematical undecidability. Ω stands as a beacon in the uncharted territories of algorithmic complexity, embodying the limits of mathematical knowledge and the inherent mystery residing within the algorithms that underpin the fabric of computation.

### 12. Champernowne Constant – D. G. Champernowne

Venture into the transcendental realm of mathematical constants, and the Champernowne constant reveals itself as a curious concatenation of digits, conceived by the British mathematician D. G. Champernowne. Represented as 0.123456789101112131415…, this constant is an irrational number formed by concatenating the natural numbers in sequence. Champernowne’s constant, an example of a transcendental number, possesses infinite non-repeating decimals, embodying both order and chaos within its numerical embrace. Its peculiar structure makes it a fascinating subject in the study of mathematical constants and the delicate balance between randomness and patterns inherent in the infinite expanse of numerical sequences. The Champernowne constant, a testament to the elegance found in mathematical constructions, beckons mathematicians to explore the boundaries where structure and randomness converge in the infinite tapestry of numbers.

### 13. Chandrasekhar Limit – Subrahmanyan Chandrasekhar

Embark on a cosmic journey into the heart of astrophysics, and the Chandrasekhar limit emerges as a celestial boundary, forever altering our understanding of stellar evolution. Named in honor of the Indian astrophysicist Subrahmanyan Chandrasekhar, this critical mass limit delineates the fate of a dying star. Beyond this threshold, approximately 1.4 times the mass of the sun, gravitational forces overwhelm electron degeneracy pressure, leading to a catastrophic collapse and the formation of a black hole or a neutron star. Chandrasekhar’s groundbreaking insights into the physics of degenerate matter paved the way for a deeper comprehension of the life cycles of stars, profoundly influencing the fields of astrophysics and cosmology.

### 14. Copeland–Erdős Constant – Paul Erdős and Peter Borwein

Navigate the realm of mathematical constants and the Copeland–Erdős constant emerges as a testament to collaboration in the pursuit of mathematical curiosity. Conceived by the prolific mathematicians Paul Erdős and Peter Borwein, this constant, denoted by C, represents the density of prime numbers in the Copeland–Erdős constant’s continued fraction expansion. The interplay of prime numbers and continued fractions unveils a mathematical dance orchestrated by these two luminaries. The Copeland–Erdős constant stands as a testament to the collaborative spirit of mathematical exploration, where minds converge to illuminate the intricate patterns woven into the numerical fabric, enriching the collective understanding of the beauty inherent in mathematical constants.

### 15. Coulomb Constant (Electric Force Constant, Electrostatic Constant, ke) – Charles-Augustin de Coulomb

In the tapestry of electromagnetism, the Coulomb constant, attributed to the pioneering work of Charles-Augustin de Coulomb, emerges as a linchpin, dictating the strength of the electric force between charged particles. Denoted by ‘ke,’ this constant finds its place in Coulomb’s Law, elegantly expressing the relationship between the magnitude of electric charges and the distance separating them. Coulomb’s meticulous experiments and mathematical formulations during the 18th century laid the foundation for the quantitative understanding of electrostatic interactions. The Coulomb constant, a numerical testament to the enduring contributions of Charles-Augustin de Coulomb, continues to shape the landscape of electrostatics, providing a fundamental framework for comprehending the intricate dance of electric charges.

### 16. Eddington Number – Arthur Stanley Eddington

Embark on a journey through the cosmic constants, and the Eddington number emerges as a celestial benchmark, named in honor of the eminent astrophysicist Arthur Stanley Eddington. Defined as the reciprocal of the fine-structure constant, approximately 137.036, the Eddington number holds significance in the cosmic balance between gravitational and electromagnetic forces. Eddington, a luminary of 20th-century astrophysics, envisioned this number as a dimensionless quantity reflecting the delicate equilibrium between the expansive and contractive forces shaping the cosmos. The Eddington number, a numerical homage to the visionary insights of Arthur Stanley Eddington, invites contemplation on the cosmic symphony and the mathematical constants that weave the fabric of the universe.

### 17. Dunbar’s Number – Robin Dunbar

Embark on an exploration of social dynamics, and Dunbar’s number unfolds as a cognitive threshold, shedding light on the complexities of human relationships. Coined by the British anthropologist and psychologist Robin Dunbar, this numerical limit, often estimated to be around 150, represents the suggested cognitive limit to the number of individuals with whom a person can maintain stable social relationships. Dunbar’s number, rooted in the size of the neocortex and its role in social bonding, has implications for understanding the structure and dynamics of human societies. It serves as a tantalizing window into the intricacies of social cognition, reminding us that the tapestry of human connections is woven with threads of cognitive constraints.

### 18. Embree–Trefethen Constant

Venture into the nuanced landscapes of numerical analysis, and the Embree–Trefethen constant emerges as a numerical guidepost, a product of the collaborative efforts of researchers Lloyd N. Trefethen and Leslie F. Embree. This constant, often denoted by $\pi_{ET}$, is intricately linked to the convergence behavior of rational approximations to the exponential function. The Embree–Trefethen constant serves as a marker in the realm of computational mathematics, where precision and efficiency converge. Its numerical significance underscores the delicate balance between approximation and accuracy in the intricate dance of numerical algorithms, inviting mathematicians and computational scientists to navigate the subtle contours of numerical precision.

### 19. Erdős–Borwein Constant

Embark on a numerical journey through the collaborative endeavors of Paul Erdős and Peter Borwein, and the Erdős–Borwein constant emerges as a testament to their joint mathematical prowess. Denoted as $E_{0}$, this constant represents a convergent series involving the reciprocal of prime numbers raised to a power. The Erdős–Borwein constant is a vivid example of the intriguing interplay between number theory and analysis, showcasing the beauty found in the convergence of mathematical series. Through their combined efforts, Erdős and Borwein have left an indelible mark on the mathematical landscape, where constants become bridges connecting disparate branches of mathematical inquiry.

### 20. Euler–Mascheroni Constant (γ) – Leonhard Euler and Lorenzo Mascheroni

Embark on a historical excursion through mathematical constants, and the Euler–Mascheroni constant, symbolized by γ, emerges as a mathematical bridge spanning the realms of number theory and calculus. The constant owes its name to the collaborative efforts of the Swiss mathematician Leonhard Euler and the Italian mathematician Lorenzo Mascheroni. Defined as the limiting difference between the harmonic series and the natural logarithm, γ is a transcendental number with profound connections to the distribution of prime numbers and the analysis of mathematical functions. Euler and Mascheroni’s collaborative contributions resonate through the ages, highlighting the symbiotic relationship between the pioneers of mathematical thought and the constants that bear their names.

### 21. Euler’s Number (e) – Leonhard Euler

Embark on a mathematical odyssey, and Euler’s number (e) reveals itself as a transcendent constant, forever intertwined with the genius of the Swiss mathematician Leonhard Euler. Denoted by the letter ‘e,’ this irrational number approximately equal to 2.71828, extends its mathematical tendrils across diverse fields. Euler’s number is the base of natural logarithms and plays a fundamental role in calculus, complex analysis, and exponential growth. Leonhard Euler, a mathematical virtuoso of the 18th century, bestowed upon the world this elegant constant, a cornerstone in the edifice of mathematical abstraction and a symbol of the inherent beauty found in the patterns of the mathematical universe.

### 22. Faraday Constant – Michael Faraday

Journey into the realm of electrochemistry, and the Faraday constant emerges as a pivotal bridge, honoring the contributions of the English scientist Michael Faraday. Symbolized by the letter ‘F,’ this constant signifies the charge of one mole of electrons and is integral to understanding the relationship between electrical charge and chemical reactions. Faraday’s groundbreaking work in the 19th century laid the foundations of electrochemistry, and the Faraday constant stands as a testament to his legacy, guiding scientists in unraveling the mysteries of chemical transformations driven by electric currents. It serves as a numerical tribute to Faraday’s enduring impact on the fusion of electricity and chemistry, illuminating the intricate dance between electrons and molecules.

### 23. Feigenbaum Constants – Mitchell Feigenbaum

Embark on a journey into chaos theory, and the Feigenbaum constants, born from the visionary insights of the American mathematician Mitchell Feigenbaum, reveal the hidden order within chaotic systems. Denoted by the Greek letters ‘alpha’ and ‘delta,’ these constants emerge in the study of bifurcations in nonlinear dynamical systems. Mitchell Feigenbaum’s pioneering work in the 1970s uncovered a universal behavior in the transition to chaos, marked by the convergence of these constants. The Feigenbaum constants, a numerical fingerprint of chaos, transcend specific systems, offering a glimpse into the universal patterns that underlie seemingly disorderly phenomena across various scientific disciplines.

### 24. Fermi Coupling Constant – Enrico Fermi

Embark on a journey into the subatomic realm, and the Fermi coupling constant stands as a measure of the strength of the weak nuclear force, a tribute to the ingenuity of the Italian physicist Enrico Fermi. Denoted by ‘G_F,’ this constant governs the interaction between subatomic particles during beta decay. Fermi, a Nobel laureate, made seminal contributions to nuclear physics, and the Fermi coupling constant remains a crucial parameter in the Standard Model of particle physics. It reflects the intricacies of weak interactions, offering insights into the transformation of particles within atomic nuclei. The Fermi coupling constant, a numerical testament to Fermi’s profound impact, continues to guide physicists in deciphering the mysteries of the subatomic world.

### 25. Gauss’s Constant – Carl Friedrich Gauss

Embark on a mathematical pilgrimage, and Gauss’s constant emerges as a testament to the brilliance of the German mathematician Carl Friedrich Gauss. This constant, often denoted by ‘G,’ is intricately linked to the study of the arithmetic-geometric mean. Gauss’s constant represents the limit of the ratio between the arithmetic mean and the geometric mean of a sequence of numbers. Within the folds of number theory and mathematical analysis, Gauss’s constant stands as a beacon of mathematical elegance, reflecting the depth of Gauss’s contributions to a myriad of mathematical disciplines.

### 26. Graham’s Number – Ronald Graham

Venture into the labyrinth of large numbers, and Graham’s number stands as a colossal mathematical construct, bearing the name of the American mathematician Ronald Graham. This gargantuan number often expressed using recursive Knuth up-arrow notation, transcends comprehension with its sheer enormity. Graham’s number originated in the pursuit of solving a problem related to Ramsey theory, showcasing the vastness that mathematics can encapsulate. An exemplar of mathematical curiosity, Graham’s number serves as a reminder of the infinite expanses that mathematical exploration can traverse, challenging our intuition and expanding the boundaries of mathematical imagination.

### 27. Hartree Energy – Douglas Hartree

Embark on a journey through quantum mechanics, and the Hartree energy emerges as a quantum mechanical milestone, a tribute to the pioneering work of the British physicist Douglas Hartree. This energy unit, often denoted by ‘E_H,’ is fundamental in the Hartree method, an early approach to solving the Schrödinger equation for atoms and molecules. Hartree’s method laid the groundwork for more sophisticated quantum mechanical models, providing a stepping stone in the quantum revolution of the early 20th century. The Hartree energy symbolizes the quest to understand the electronic structure of matter, reflecting the ingenuity of scientists in deciphering the quantum mysteries that govern the microscopic world.

### 28. Hubble Constant – Edwin Hubble

Embark on a cosmic odyssey, and the Hubble constant unfolds as a cosmic tape measure, named in honor of the American astronomer Edwin Hubble. Denoted by ‘H₀,’ this constant quantifies the rate at which the universe is expanding. Hubble’s groundbreaking observations in the 1920s revealed a universe in dynamic flux, expanding in every direction. The Hubble constant, a key parameter in cosmology, not only bears witness to the vastness of the cosmos but also unravels the cosmic drama of the universe’s evolution. Edwin Hubble’s legacy lives on in this constant, guiding astronomers in their quest to fathom the mysteries of the universe’s celestial dance.

### 29. Josephson Constant – Brian David Josephson

Embark on a journey into the quantum realm, and the Josephson constant comes to the fore as a quantum mechanical beacon, named after the Welsh physicist Brian David Josephson. Symbolized by ‘K_J,’ this constant is fundamental to the Josephson effect, which describes the phenomenon of supercurrent—persistent electric current without voltage—in superconductors. Josephson’s groundbreaking work in the 1960s earned him the Nobel Prize in Physics, and the Josephson constant remains a key parameter in the realm of superconductivity, offering a window into the quantum coherence of electron pairs traversing superconducting junctions.

### 30. Kaprekar’s Constant – D. R. Kaprekar

Embark on a mathematical quest, and Kaprekar’s constant reveals itself as a numerical curiosity, bearing the name of the Indian mathematician D. R. Kaprekar. This constant, often denoted as 6174, is at the heart of Kaprekar’s routine—an iterative process applied to certain four-digit numbers that converge to the mysterious constant 6174. Kaprekar’s Constant showcases the enchanting beauty found in mathematical manipulations, inviting mathematicians and enthusiasts alike to explore the captivating patterns embedded within seemingly ordinary numerical sequences.

### 31. Kerr Constant – John Kerr

Venture into the realm of theoretical physics, and the Kerr constant emerges as a pivotal parameter in the description of rotating black holes, named after the New Zealand mathematician and physicist John Kerr. Denoted by ‘a,’ this constant characterizes the angular momentum of a black hole, influencing its properties and behavior. Kerr’s solution to Einstein’s field equations in the context of rotating black holes revolutionized our understanding of these cosmic entities, providing a foundation for the study of astrophysical phenomena near these enigmatic gravitational singularities.

### 32. Khinchin’s Constant – Aleksandr Khinchin

Embark on a mathematical expedition, and Khinchin’s constant becomes a numerical beacon, honoring the Russian mathematician Aleksandr Khinchin. Often denoted by ‘K,’ this constant appears in the context of the law of large numbers and continued fractions. Khinchin’s Constant embodies the statistical behavior of sequences, reflecting the regularity inherent in the convergence of continued fractions. Khinchin’s contributions to number theory and probability theory echo through the presence of this constant, inviting mathematicians to delve into the subtle intricacies of numerical patterns and probabilistic phenomena.

### 33. Landau–Ramanujan Constant – Edmund Landau and Srinivasa Ramanujan

Embark on a mathematical duet, and the Landau–Ramanujan constant emerges as a melodic collaboration, named after the German mathematician Edmund Landau and the legendary Indian mathematician Srinivasa Ramanujan. This constant, often denoted by ‘K,’ finds its roots in the realm of number theory, specifically in the study of the distribution of prime numbers. The Landau–Ramanujan constant serves as a testament to the symbiotic relationship between mathematical minds across cultures and periods, reflecting the enduring legacy of collaboration in the pursuit of mathematical truth.

### 34. Legendre’s Constant (One, 1) – Adrien-Marie Legendre

Embark on a numerical exploration, and Legendre’s constant, a seemingly humble entity represented simply by the number one, unfolds as a fundamental numeric landmark. Named after the French mathematician Adrien-Marie Legendre, this constant often appears in number theory, integral calculus, and mathematical analysis. The simplicity of Legendre’s Constant belies its significance, serving as a unifying symbol in diverse mathematical contexts, a silent witness to the elegance found in the foundational principles that underpin mathematical structures.

### 35. Loschmidt Constant – Johann Josef Loschmidt

Venture into the world of statistical physics, and the Loschmidt constant emerges as a cornerstone in the kinetic theory of gases, honoring the Austrian scientist Johann Josef Loschmidt. Denoted by ‘n₀,’ this constant represents the number of molecules per unit volume in an ideal gas. Loschmidt’s contributions to understanding the microscopic properties of gases laid the groundwork for the development of statistical mechanics. The Loschmidt constant, a numerical avatar of Loschmidt’s insights, stands as a bridge between the macroscopic and microscopic realms, offering a quantitative glimpse into the bustling world of molecules.

### 36. Ludolphsche Zahl – Ludolph van Ceulen

Embark on a historical mathematical journey, and Ludolphsche Zahl, named after Ludolph van Ceulen, unveils itself as a numerical tribute to the perseverance of this Dutch mathematician. Ludolphsche Zahl is synonymous with the mathematical constant pi (π), specifically representing its value to an extraordinary number of decimal places. Van Ceulen devoted a significant portion of his life to the calculation of pi and, upon his death, had the value engraved on his tombstone up to 35 decimal places—an enduring symbol of mathematical dedication and the relentless pursuit of precision in the realm of numerical constants.

### 37. Mean of Phidias (Golden Ratio, ϕ, Phi) – Phidias

Embark on a journey through art and mathematics, and the “Mean of Phidias” emerges as a symbolic union, honoring the ancient Greek sculptor Phidias. This term refers to the golden ratio, often denoted by the Greek letter ϕ (phi), a proportion that appears in various forms of art and architecture, including the Parthenon in Athens, a masterpiece crafted under Phidias’s influence. The Mean of Phidias serves as a bridge between aesthetic harmony and mathematical elegance, reflecting the ancient recognition of the inherent beauty found in the golden ratio.

### 38. Meissel–Mertens Constant

Venture into the realm of number theory, and the Meissel–Mertens constant surfaces as a numerical constant with deep connections to prime numbers. Named after the mathematicians Ernst Meissel and Franz Mertens, this constant is denoted by ‘M.’ It plays a role in the Meissel–Lehmer algorithm for counting prime numbers, illustrating the intricate interplay between mathematical constants and the properties of prime numbers. The Meissel–Mertens constant stands as a numerical guidepost, guiding mathematicians through the labyrinthine landscape of prime number theory.

### 39. Moser’s Number

Embark on a whimsical journey through number theory, and Moser’s Number captures the spirit of mathematical playfulness. Coined after the mathematician Leo Moser, this number is an extremely large, finite integer with a unique and intriguing property. Moser’s Number embodies the creative side of mathematics, where the construction of such numbers serves as a playground for mathematical exploration, challenging conventional notions and delighting in the sheer diversity of numerical possibilities.

### 40. Newton’s Constant (Gravitational Constant, G) – Sir Isaac Newton

Enter the realm of classical physics, and Newton’s Constant stands as a gravitational anchor, honoring the profound insights of the English mathematician and physicist Sir Isaac Newton. Denoted by ‘G,’ this constant appears in Newton’s law of universal gravitation, describing the attractive force between two masses. Newton’s Constant, a fundamental parameter in physics, governs the gravitational interactions that shape the celestial dance of planets, stars, and galaxies. Sir Isaac Newton’s revolutionary contributions to physics find their numerical expression in G, a constant that weaves its influence through the tapestry of classical mechanics and celestial dynamics. Buy Electronic Components, lC chips, Module Darlington, Capacitor, find chips, diode, Transistors, Sensors, and IGBT at Utsource.

### 41. Planck Constant (h) – Max Planck

Embark on a journey into the quantum realm, and the Planck constant stands as a foundational pillar, a tribute to the brilliance of the German physicist Max Planck. Symbolized by ‘h,’ this constant underpins the fabric of quantum mechanics, representing the fundamental granularity of energy in the microscopic world. Max Planck’s groundbreaking work in the early 20th century, for which he was awarded the Nobel Prize in Physics, laid the groundwork for a revolution in physics, ushering in the era of quantum theory.

### 42. Reduced Planck Constant or Dirac Constant (h-bar, ħ) – Max Planck, Paul Dirac

Venture deeper into quantum mechanics, and the Reduced Planck Constant, often denoted by ‘h-bar’ or ‘ħ,’ emerges as a refined measure, a collaboration between Max Planck and the brilliant British physicist Paul Dirac. This constant represents the ratio of the Planck constant to 2π, providing a convenient scale for quantum phenomena. The Reduced Planck Constant embodies the fusion of classical and quantum physics, playing a pivotal role in the Heisenberg Uncertainty Principle and quantum wave mechanics.

### 43. Ramanujan–Soldner Constant – Srinivasa Ramanujan and Johann Georg von Soldner

Embark on a numerical exploration guided by mathematical virtuosos, and the Ramanujan–Soldner Constant emerges as a numerical beacon, named after the Indian mathematician Srinivasa Ramanujan and the German astronomer Johann Georg von Soldner. This constant, often denoted as ‘μ,’ plays a role in the computation of elliptic integrals and has connections to mathematical astronomy. The collaboration of Ramanujan and Soldner stands as a testament to the cross-disciplinary nature of mathematical constants, where the intricacies of number theory and celestial mechanics converge.

### 44. Richardson Constant – Owen Willans Richardson

Enter the realm of thermionics, and the Richardson Constant pays homage to the pioneering work of the British physicist Owen Willans Richardson. Named after its discoverer, this constant, often denoted as ‘A,’ characterizes the relationship between temperature and the emission of electrons from a metal surface. Richardson’s groundbreaking investigations into thermionic emission earned him the Nobel Prize in Physics in 1928. The Richardson Constant serves as a crucial parameter in understanding electron behavior in vacuum tubes and electron devices, marking a cornerstone in the development of electronic technology.

### 45. Rayo’s Number – Agustin Rayo

Embark on a mathematical journey, and Rayo’s Number emerges as a formidable numerical construct, named after the philosopher and logician Agustin Rayo. This immense number is famously known for being the largest number ever used in a serious mathematical proof. Rayo’s Number stands as a symbol of the vastness that mathematical concepts can reach, pushing the boundaries of human comprehension and showcasing the intersection of philosophy and mathematics.

### 46. Rydberg Constant – Johannes Rydberg

Venture into the realms of atomic physics, and the Rydberg Constant stands as a pivotal parameter, honoring the Swedish physicist Johannes Rydberg. Symbolized by ‘R,’ this constant plays a crucial role in understanding the spectral lines of hydrogen and other elements. Rydberg’s work on atomic spectroscopy in the late 19th and early 20th centuries laid the groundwork for the development of quantum mechanics. The Rydberg Constant, a numerical fingerprint of atomic structure, reflects Rydberg’s contributions to unraveling the mysteries of the microcosmic world.

### 47. Sommerfeld Constant – Arnold Sommerfeld

Embark on a journey into quantum physics, and the Sommerfeld Constant pays homage to the pioneering work of the German physicist Arnold Sommerfeld. Denoted by ‘σ,’ this constant appears in the fine-structure constant, a dimensionless quantity that characterizes the strength of electromagnetic interactions between elementary charged particles. Sommerfeld’s contributions to the development of quantum theory and atomic structure during the early 20th century reverberate through the presence of the Sommerfeld Constant, emphasizing the delicate dance of particles and fields in the quantum realm.

### 48. Sackur–Tetrode Constant – Otto Sackur and Hugo Tetrode

Enter the domain of statistical mechanics, and the Sackur–Tetrode Constant emerges as a numerical guidepost, named after the German physicists Otto Sackur and Hugo Tetrode. Represented by ‘S₀,’ this constant is associated with the entropy of an ideal gas. The Sackur–Tetrode Constant forms an integral part of the Sackur–Tetrode equation, providing insights into the thermodynamic properties of gases and contributing to the foundation of statistical mechanics. The collaboration between Sackur and Tetrode stands as a testament to the shared pursuit of understanding the intricate behaviors of particles on a molecular scale.

### 49. Sierpiński’s Constant – Wacław Sierpiński

Embark on a mathematical expedition, and Sierpiński’s Constant emerges as a numerical enigma, named after the Polish mathematician Wacław Sierpiński. Often denoted by the Greek letter ‘K,’ this constant is intricately linked to number theory and the properties of certain sets. Sierpiński’s Constant represents a fixed point in the iteration of a mathematical function, revealing the profound and sometimes elusive beauty embedded in the world of mathematical constants.

### 50. Skewes’ Number – Stanley Skewes

Venture into the landscape of number theory, and Skewes’ Number stands as a numerical milestone, named after the South African mathematician Stanley Skewes. This colossal number is known for its significance in the study of prime numbers and the moment when it was first shown that there must be a crossover point where π(x) surpasses the logarithmic integral Li(x). Skewes’ Number highlights the intricate dance between the distribution of prime numbers and the underlying structures in number theory.

### 51. Stefan–Boltzmann Constant – Jožef Stefan and Ludwig Boltzmann

Embark on a journey into thermodynamics, and the Stefan–Boltzmann Constant pays homage to the Slovenian physicist Jožef Stefan and the Austrian physicist Ludwig Boltzmann. Denoted by the symbol ‘σ,’ this constant plays a fundamental role in describing the power radiated by a black body. Stefan’s law, formulated by Jožef Stefan, and the Stefan–Boltzmann Law, which incorporates Ludwig Boltzmann’s contributions, quantify the relationship between temperature and the total energy radiated by a black body. The Stefan–Boltzmann Constant stands as a numerical bridge connecting the macroscopic world of heat and radiation to the foundational principles of statistical mechanics.

### 52. Theodorus’ Constant (√3 ≅ ±1.732050807568877…) – Theodorus of Cyrene

Embark on a historical mathematical journey, and Theodorus’ Constant reveals itself as an ancient numerical treasure, attributed to the Greek mathematician Theodorus of Cyrene. Often represented by the square root of 3 (√3), this irrational number possesses a profound role in geometry, particularly in the context of Pythagorean triples. Theodorus’ Constant, intimately tied to the elegance of right-angled triangles, showcases the timeless beauty found in ancient mathematical discoveries and the enduring legacy of mathematical constants across the ages.

### 53. Tupper’s Number – Jeff Tupper

Embark on a journey through the realms of number theory and visual art, and Tupper’s Number emerges as a curious and visually striking mathematical construct, named after the computer scientist Jeff Tupper. This integer, often denoted as ‘K,’ is notable for its appearance when graphed on a Cartesian plane. Tupper’s Number showcases the fascinating interplay between mathematical concepts and graphical representations, reminding us of the diverse ways in which numbers can captivate our mathematical imagination.

### 54. Viswanath’s Constant – Divakar Viswanath

Venture into the world of mathematical constants, and Viswanath’s Constant takes center stage, named after the Indian-American mathematician Divakar Viswanath. Denoted by the letter ‘C,’ this constant is intimately linked to the distribution of digits in the decimal expansion of certain mathematical constants, including π. Viswanath’s work highlights the intricate patterns that emerge within seemingly random sequences, underscoring the beauty found in the exploration of mathematical constants and their underlying structures.

### 55. Von Klitzing Constant – Klaus von Klitzing

Embark on a journey into quantum physics, and the von Klitzing Constant stands as a cornerstone, paying tribute to the German physicist Klaus von Klitzing. Denoted by ‘Rₖ,’ this constant is crucial in the field of quantum Hall effect, providing a precise quantization of the Hall resistance. Klaus von Klitzing’s groundbreaking discovery in the early 1980s earned him the Nobel Prize in Physics, and the von Klitzing Constant continues to serve as a fundamental parameter in precision measurements and the quantum metrology of resistance.

### 56. Wien Displacement Law Constant – Wilhelm Wien

Enter the realm of thermal radiation, and the Wien Displacement Law Constant pays homage to the German physicist Wilhelm Wien. Represented by the letter ‘b,’ this constant plays a vital role in Wien’s displacement law, describing the relationship between the temperature of a black body and the wavelength at which its emission is most intense. Wien’s pioneering work in the late 19th century paved the way for the development of quantum theory, and the Wien Displacement Law Constant remains a numerical testament to his contributions in understanding the thermal properties of radiation.

I hope this article on constants in science was worth reading.

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