THE NEWTONIAN MODEL OF THE GRAVITATIONAL RED SHIFT AND THE MEASURE OF THE DISTANCES IN COSMOLOGY.

The measurement of the distances of the astrophysical objects is very ifficult task in cosmology. From experimental point of view, different cosmological ladders are used to measure the distances of the stars of the galaxies with the help of the redshift calculations of the astrophysical objects. As we know that the gravitational redshift plays an important role in this regard because it carries the information of the potential field at which the photon is emitted and the application of the Newtonian gravity to calculate the distances of the white dwarf and neutron stars are possible provided we know their masses. In spectroscopy the measurement of the redshift can be done very accurately. The theoretical calculation of the gravitational red shift requires the combination of Newtonian gravity, particle theory of light and weak equivalence principle of gravitating mass equals inertial mass. According to this theory, the light emitted by the distance stars get stretched and this phenomenon is known as gravitational red shift. The wavelength of the light emitted by the stars is increased and consequently the frequency of the light received by us on earth is decreased. In this paper, we use Newtonian gravity and the property of the homogenous and isotropic space to estimate the various parameters of the astrophysical objects by the theoretical study of the gravitational redshift and compare them with the experimental results.