A Black Hole bends a light ray by the order of θ = GM/c2r where M=mass of Black Hole , c is the speed of light and r is the distance of the light ray from the Black Hole. My understanding is that the Black Hole bends every part of light ray so the overall bending angle is significant. Suppose a light ray has three points A, B and C. Distance between A & B is 6400Km and distance between B & C is also 6400Km. The distance between B and the Black Hole is also 6400Km. If light ray comes from point A then the Black Hole srats bending the light ray by the order of θ = GM/c21.414r and gradually increases and becomes max at point B. The over all bending angle would be θ = GM/c2r x 12800000 (where M is the mass of black hole equal to mass of sun).

A__ B C__

Black Hole

1## Re: Gravitational Lensing