The Ives-Stilwell experiment and others (Mössbauer Rotor) show, that the emitted light frequency f(v) of a source with velocity v differs from the frequency f(0) of a non-moving source by
f(v) = f(0) / Lorentz-factor
with Lorentz-factor = 1/ square-root (1- (v² / c²)) ;
What can be concluded by this?
Choice of test answers:
A) Atomic energy changes by movement
B) Time changes by movement