Optical Approach to Gravitational Redshift

This paper explores an optical interpretation of the gravitational redshift effect, and shows how the deflection of light and the radar echo delay can be calculated from the point of view of optics. As a result of these considerations, this work establishes new relationships between general relativity and geometrical optics with regard to the propagation of light in the gravitational field, introducing an optical metric - the optical version of the Schwarzschild metric