Gravitational Redshift

The paper discusses the gravitational redshift, which is related to the frequency shift of the electromagnetic wave emitted by the source in the gravitational field. Gravitational redshift was predicted by Einstein from the general theory of relativity (1911). This shift in the weak gravitational field is related to the difference in gravitational potential between a given height above the Earth's surface and that on the Earth's surface. In relation to gravitational redshift, Pound and Rebka's experiment is described in detail in the paper in the 22.6-meter high tower The light source and detector were placed. Both the light source and the detector were gamma radioactive (14.4 keV energy) iron 57Fe isotope. Due to the high sensitivity of the experimental measurement, the paper also discusses the Mössbauer effect, which was the basis of Mössbauer spectroscopy and was used in the experiment to realize the resonant absorption process. The bachelor's thesis also describes a relatively modern experiment, which was conducted in 1976. In the Gravity Probe A experiment led by Robert Vesso (Smithsonian Institution) at an altitude of 10,273 km above the Earth's surface, the gravitational displacement was measured between two hydrogen masers: one placed on the Earth's surface and the other on a suborbital rocket. The accuracy of measurement (difference between theoretical and experimental data) was 0.007%.