Deduce Snell's Law of refraction for a plane wave using Huygen's principle.
What is Snell's law of refraction? What does it imply?
Define Snell's law of refraction. A ray of light is incident on a glass slab at angle of incidence of 60^(@) . If the angle of refraction be 32.7^(@) , calculate the refractive index of glass. (Given: sin 60^(@)=0.866 and sin32.7^(@)=0.540) .
