R.I. Khrapko Moscow State Aviation Institute (National Research University), Volokolamskoe shosse 4, Moscow, 125872, Russian Federation
It is shown that the gravitational and inertial masses of a photon or indeed of any body are equal. Motion past and free fall onto a center of gravitational attraction are considered.
Keywords: equivalence principle, mass PACS:04.20.−q DOI:10.3367/UFNe.0185.201511g.1225 URL: https://ufn.ru/en/articles/2015/11/f/ Citation: Khrapko R I "Gravitational mass of the photons" Phys. Usp.58 1115–1117 (2015)