SRT by an uneducated Socratus.
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SRT is based onthree facts !
Fact number 1:
The constant speed of photon in vacuum is minimal.
Fact number 2:
The inertia of photon depends on its potential energy:E=Mc^2
Fact number 3:
Every speed and energy
( including the speedand energy of photon ) are relative.
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Israel Socratus