Deduce Snell's Law of refraction for a plane wave using Huygen's principle.

Huygens principle

Define Snell's law of refraction.

When does Snell's Law of refraction fail ?

One can use Huygen's principle to

Wave Front|Huygen's Principle

Wavefront and Huygens principle

a) Define a wave front. b) Draw the diagram to show the shape of plane wave front as they pass through (i) a thin prism and (ii) a thin convex lens. State the nature of refracted wave front. c) Verify Snell’s law of refraction using Huygens’s principle

State Snell's law.