If the speed of Light quantum is constant:?

Question

1.

The speed of Light quantum is constant: c=1,

no matter how the source or the observer moves.

/ Michelson’s experiment. 1881. , SRT. 1905. /

2.

But .. .. in every book and textbook is written that

there isn’t absolute speed. For example in the book

“ Relative theory- actual” by Prof. Ernst Schmutzer.

Part 3.2.2.page 122. and

Part 3.2.4. page 130.

Another book “Relativity for the layman”

By James A. Coleman.

Part 3 pages 47 -48

Book “The materialistic essence of Einstein’s

Relative theory” by Mostepanenko M. B.

Page 37.

Book “ Einstein and development of physical/

mathematical thought.” by Science Academy of

USSR. Article “ Physics and Relative theory”

by M. Born. On the pages 74 and 81.

And article “ Relative theory and some questions

about the optic of moving bodies” by Francfurt U. I.

and Frenk A.M. Page 224: “ Relative theory

doesn’t know absolute moving”.

etc….

3.

From the school days I cannot understand how

it is possible to say that the speed of photon is

absolute constant c=1 and in the same time to say :

“ All motion is relative (hence ,the theory of relativity).

We can never speak of absolute motion as such,…..”

…etc.

Maybe somebody can explain me this paradox.

==========..

Answer 1

yes, in the Planck units ;c=1

Answer 2

Thing with Theory of Relativity is, it itself is relative. As you approach the sub-atomic scales, you have to use Quantum Theory. Likewise, at the speeds close to the speed of light, much of what we know is changed. Most notably, the relative flow of time is changed. Since time is connected to speed, the change of the flow of time is such that the speed of light remains constant whatever the frame of reference. Thus, the speed of light is denoted as a physical constant.

Answer 3

It is only constant in the vacuum . in a medium where refaction index is n , iti is c/n