Question

if the angle of incidence of a ray of light travelling in air and incident on a glass surface is 30 degree. The angle of refraction is ​

Answer 1

The angle of refraction will be less than the angle of incidence if the medium in which light enters is more denser than the previous one.

Angle of refraction changes light has to travel the same path but has to travel it faster as possible thus it changes it's direction and tilts towards the normal which is always less than the angle of incidence,

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