View Full Version : Einstein's light clock

2014-Sep-27, 04:34 PM
Traditionally the famous Einstein's light clock is served as an example, which leads to the time dilation phenomena.
I propose to consider a little modified version of the clock: with a refractive medium: n <> 1.
The light impulse propagate with a speed c/n, thus the right triangle relation gives:
(c/n)^2 = c_y^2 + v^2\to c_y = c/n \sqrt{1 - n^2 v^2/c^2}
So, the moving clock slows down
\sqrt{1 - n^2 v^2/c^2} times,
what is different than the desired result:
1/\gamma = \sqrt{1 - v^2/c^2}

Only for a refractive index n = 1, means for the vacuum, the clock slows down correctly!
Impossible! What's that, where is a mistake?