
#1
Sep2610, 05:10 PM

P: 1

I was wondering if the speed of light (c) can be derived from Planck's constant (h) or the opposite way.
I know that they are both fundamental constants, but I'm sure they are connected somehow. Saying it on a different way: if Planck's constant would be different, would the speed of light change? Which would be the way on how to proceed for a hypothetical proof? 



#2
Sep2710, 02:12 AM

P: 2,456

The name ‘fundamental constants’ is misleading; G, h and c are not constants at all: in the Fundamental Planks units G=h=c=1. But you can vary parameters of the standard model instead.




#3
Sep2810, 02:52 AM

P: 1,412

It can be "derived" if one day in the future we will understand why the fine structure constant is dimensionless and why its value is close to 1/137. But asking such questions is being strongly discouraged by what is known as "mainstream physics". Once upon a time Princeton physicists (Dyson) were interested in these questions, but they are not for an ordinary folk to ask.




#4
Sep2810, 02:54 AM

P: 2,456

Speed of light derived from Planck constant?
fine structure constant is part of parameters of dimensionless parameters of the Standard model. It is not very special  there are many other dimensionless constants.




#5
Sep2810, 03:09 AM

P: 1,412




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