REFRACTION OF LIGHT

Refraction of light is bending of light away from the normal as it passes from one material to another.according to the law of refraction of light given by snells if light enters from one medium to another it is either refracted away from normal or towards normal,the incidence ,normal and refracted rays of  light all lie on the same medium.every object has its own refractive index which can be calculated by snell's relation mathematically as sin<i / sin<r  = n so refractive index can be defined as the ratio of the angle of incidence to the angle of refraction.is it possible that reflection and refraction occurs simultaneously?yes certainly it happens when we object outside the fast moving train then reflection and refraction occurs simultaneously.

REFLECTION OF LIGHT

when a light hits the smooth surface it will be reflected in this way, the angle of incidence must be equal to the angle of reflection according to the law of reflection.however when it hits the curved surface it will bounce back to different direction.law of reflection also states that the incident,normal and reflected rays all lie on the same plane.incident rays are those which hits the smooth surface such as mirror and reflected rays are those which make the angle equal to the incident rays.there are two kinds of reflection of light i.e regular reflection and diffused reflection.regular reflection is the reflection of light from the smooth surface while irregular reflection is the reflection of light from the uneven surface.