It is called "refraction".
Refraction
Everybody knows change in speed of light causes to bend light. But why does light bends towards normal when passing from rarer to denser and vice versa?
Light will propage in "a straight line" when passing through a single medium. The "straight line" however bends depending on the gravitation curvature of the volume being passed through.
the light bends
Light bends because of the difference of speed in each medium.
Refraction
Refraction, which is the bending of light
Everybody knows change in speed of light causes to bend light. But why does light bends towards normal when passing from rarer to denser and vice versa?
The bending of a wave as it moves from one medium into another is called refraction.
Light will propage in "a straight line" when passing through a single medium. The "straight line" however bends depending on the gravitation curvature of the volume being passed through.
Diffraction
the light bends
Light bends because of the difference of speed in each medium.
Yes, Light bends towards the normal when it travels from air to another medium and bends away when going into air from another medium. This can be affected by the angle of incidence and what angle it is.
Because of the refraction of light. Light bends when it passes from one medium to another, this bending is called refraction not to be confused with reflection.
When light is Refracted it bends when it travels from one medium to another
Index of Refraction