


The gravitational redshift of a optical vortex being different from that of an gravitational redshift plane of an electromagnetic waveĪ hypothesis put forward in late 20th century and subsequently substantiated experimentally posited the existence of optical vortices (twisted light). We discuss availabilities to confirm the GRS effect for galaxies and galaxy clusters in visible and X-ray ranges of the electromagnetic spectrum. In particular, we consider the GRS effects in the gravitational field of the Earth, the major planets of the Solar system, compact stars (white dwarfs and neutron stars) where this effect is confirmed with a higher accuracy. This paper provides a brief overview of experiments as concerns with the tests of the gravitational redshift (GRS) effect in ground-based and space-born experiments. Tests of the gravitational redshift effect in space-born and ground-based experiments
