Optic-Mechanical Analogy and Gravitational Effects in the Extended Space Model

New approach to the description of a gravitation using analogy between the optical and mechanical phenomenon is advanced. For this purpose in extended (1+4)-dimensional space G(1,4) the gravitational effects are considered: the speed of escape, red shift, radar echo, deviation light and perihelion precession of Mercury. It is shown, that methods of the Extended Space Model (ESM) give the same outcomes, as General Theory of Relativity (GR). The various ways of introduction of refraction index are discussed, which appropriate to the gravitational field.