Question

how does light refract at a curved surface​

Answer 1

Answer:

Law of reflection ,the angle at which the light hits a surface is equal to the angle at which light bounces away from the surface .You can see that direction by drawing a tangent to the curved surfaces.

Answer 2

Answer:

For every point in curved surface there. is a normal on it.When the ray falls on any. point it makes some angle with normal and following law of reflection the reflected ray make equal angle with normal as incident ray goes backward . that's how light refracted at curved surface.For more study reflection of light at curved surfaces.