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← ScienceWhich effect is measured, verifying the equivalence principle in gravitational redshift?
A)Photon frequency shifts measurably change.✓
B)Increased gravitational wave amplitude detected.
C)Neutrino oscillation rates significantly accelerate.
D)Supernova luminosity appears intrinsically brighter.
💡 Explanation
Gravitational redshift tests equivalence via photons losing energy climbing out of a gravity well. The mechanism is photon 's frequency shift because photons experience a change in observed frequency at different gravitational potential. Therefore the photon frequency changes rather than differing arrival times because of dispersion effects.
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