Autori: Florentin Smarandache
Editorial: PSF13 Meeting of The American Physical Society, 2013.
Two clocks C1 and C2 are synchronized on the earth. Then clock C2 is ying with a uniform speed at an altitude h >0 above the earth.
1. According to the Special Theory of Relativity there is symmetry of time dilation between C1 and C2.
2. But, according to the General Theory of Relativity, there is an asymmetry of time between C1 and C2, since the clock C1 is running slower down in the gravitational eld than the clock C2 which is running faster at a higher altitude.