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Physical-constants
New post in Physical-constants
Why does the speed of light $c$ have the value it does?
August 1st, 2022
speed-of-light
electromagnetic-radiation
physical-constants
speed
What does it mean to say "Gravity is the weakest of the forces"?
May 20th, 2020
physical-constants
interactions
forces
gravity
What does it mean that dimensionless physical constants cannot be calculated but only measured?
August 1st, 2022
renormalization
physical-constants
dimensional-analysis
quantum-electrodynamics
measurements
How can Planck's constant take different values?
August 1st, 2022
deformation-quantization
semiclassical
physical-constants
quantum-mechanics
Is there a limit to acceleration?
May 31st, 2020
physical-constants
acceleration
Why do universal constants have the values they do?
July 20th, 2020
physical-constants
anthropic-principle
absolute-units
units
Is it possible to speak about changes in a physical constant which is not dimensionless?
March 1st, 2020
dimensional-analysis
physical-constants
faq
How can we define the kilogram in terms of Planck's constant?
July 16th, 2020
metrology
mass
physical-constants
si-units
About uncertainty/error of speed of light?
January 17th, 2020
physical-constants
Why is the speed of light in vacuum constant?
January 6th, 2020
special-relativity
speed-of-light
metrology
physical-constants
reference-frames
How do we know the precise speed of light in a vacuum?
September 14th, 2020
si-units
speed-of-light
physical-constants
error-analysis
metrology
Could one argue that h (Planck constant) and $\hbar$/2 (Dirac constant) are in fact independant constants?
April 9th, 2020
quantum-mechanics
physical-constants
second-quantization
quantum-field-theory
Planck's constant and the Uncertainty principle
January 9th, 2020
commutator
canonical-conjugation
physical-constants
heisenberg-uncertainty-principle
quantum-mechanics
Why is the Fermi coupling constant always expressed in units of $(\hbar c)^3$?
August 1st, 2022
si-units
weak-interaction
dimensional-analysis
absolute-units
physical-constants
Explain why quantum behavior is not observed in daily life
August 1st, 2022
everyday-life
quantum-mechanics
physical-constants
What is the smallest existing thing in theory and law?
December 27th, 2020
physical-constants
quantum-gravity
Why is the Luminiferous aether theory wrong?
June 29th, 2020
electromagnetic-radiation
electromagnetism
aether
physical-constants
speed-of-light
Calculation of the weak coupling constant
June 17th, 2020
weak-interaction
electroweak
standard-model
quantum-field-theory
physical-constants
What Planck units are limits?
February 19th, 2020
absolute-units
physical-constants
quantum-mechanics
Difference between theoretical equations and empirical equations
April 25th, 2020
dimensional-analysis
experimental-physics
units
physical-constants
What is the partition function of a classical harmonic oscillator?
October 28th, 2020
statistical-mechanics
partition-function
physical-constants
dimensional-analysis
harmonic-oscillator
What is a proportionality constant? (Planck's constant)
May 2nd, 2020
physical-constants
dimensional-analysis
photons
units
How to measure the mass of Earth?
August 1st, 2022
physical-constants
earth
newtonian-gravity
experimental-physics
mass
What are the physycal meaning of universal constants such as the magnetic, electric and gravitational constants?
August 1st, 2022
physical-constants
Are length contractions limited by Planck length?
April 27th, 2020
quantum-gravity
length-contraction
physical-constants
special-relativity
Is there any relation between Planck constant and Gravitational constant?
August 1st, 2022
physical-constants
quantum-mechanics
quantum-gravity
newtonian-gravity
What do physicists mean when they say "speed of light"?
October 9th, 2020
refraction
special-relativity
speed-of-light
terminology
physical-constants
The fine structure constant
October 20th, 2021
quantum-mechanics
atomic-physics
dimensional-analysis
physical-constants
What is the significance of Planck charge?
August 1st, 2021
physical-constants
quantum-gravity
units
absolute-units
charge
Can we really neglect gravitational strength?
August 1st, 2022
estimation
standard-model
physical-constants
gravity
order-of-magnitude
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