Light Needs a Medium to Travel

Abstract

In physics any object needs a medium to travel, light can travel without a medium. That this statement is not true and that light needs a medium to travel; This paper aims to explain with sufficient evidence that the reason of light bends is not because the surface is curved (as Einstein suggested), but because the structure of the medium through which the light travels causes it to bend. This paper describes by the two postulates that black holes cannot be seen and that light bends near the massive object.