Define Snell's law of refraction.

When does Snell's Law of refraction fail ?

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

Use Huygen's principle to show how a plane wavefront propagates from a denser to rarer medium. Hence verift snell's law of refreaction.

What is Snell's law of refraction? What does it imply?

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

(a) State Snell's law of refraction of light. (b) A transparent medium A floats on another transparent medium B. When a ray of light travels obliquely from A into B, the refracted ray bends away from from the normal. Which of these two media A or B are optically denser and why ?