Arrive at Snell's law of refraction, using Huygen's principle for refraction of a plane wave.

State Snell's law of refraction of light?

State laws of refraction.

According to Huygens' principle, during refraction of light from air to a denser medium

Huygens principle of secondary waves is used to :

Snell's law of refraction does not hold good when the angle of incidence on a refracting surface is

Using Huygens principle, show that the angle of incidence is equal to angle of reflection during a plane wave front reflected by a plane surface.