New post in Physical-constants

Is speed of light a ratio or a universal constant?

August 31st, 2021

August 1st, 2022

Why was the Planck constant $h$ fixed to be exactly $6.62607015\times10^{−34}\text{Js}$ and not some other value?

December 8th, 2020

May 14th, 2020

Comparing the strength of gravity and electricity

October 2nd, 2020

What's exactly the new definition of kilogram, second and meter?

September 28th, 2020

Gravitational Constant in Newtonian Gravity vs. General Relativity

February 12th, 2020

August 1st, 2022

Where does the fine structure constant come from?

January 3rd, 2020

Why is the gravitational constant so difficult to measure?

August 23rd, 2020

The origin of the value of speed of light in vacuum

December 3rd, 2021

May 23rd, 2021

March 18th, 2020

August 1st, 2022

August 1st, 2022

Why and how is the speed of light in vacuum constant, i.e., independent of reference frame?

August 29th, 2021

March 8th, 2021

April 3rd, 2020

Why is the Planck constant an exact number with defined value?

October 12th, 2020

How to get Planck length

January 5th, 2020

Is the Boltzmann constant really that important?

December 26th, 2020

March 12th, 2021

Is the Planck length the smallest length that exists in the universe or is it the smallest length that can be observed?

November 27th, 2020

2002 research: speed of light slowing down?

October 29th, 2020

Why should the Planck constant be a constant throughout all space?

October 15th, 2020

Dimensionless Constants in Physics

October 8th, 2020

What is the proof that the universal constants ($G$, $\hbar$, $\ldots$) are really constant in time and space?

September 13th, 2020

August 1st, 2022

August 1st, 2022

Physicists adding 3 decimals to the fine structure constant is a big accomplishment. Why?

December 13th, 2020