Mendel Sachs may be its only notable living opponent, and historically Herbert Dingle railed against it.
Mendel Sachs may be its only notable living opponent, and historically Herbert Dingle railed against it. The most canonical experiment testing this used the Mossbauer Effect and was performed by J.C. Hafele and R.E. Keating. Invented by Paul Langevin, it has most recently been resolved by Subhash Kak, who used the anisotropy resulting from motion compared with an isotropic universe. It can be more simply resolved either by noting the asymmetry in the Doppler-shifting of light pulses or simply by noting that one of the participants is accelerating while the other is not. Most famously formulated by Einstein, FTP, identify this so called paradox involving siblings of the same age.
Mendel Sachs may be its only notable living opponent, and historically Herbert Dingle railed against it.
{twin} paradox (accept {clock} paradox before FTP)