Define wavefront. Draw the shape of refracted wavefront when the plane incident wave undergoes refraction from optically denser medium to rarer medium. Hence prove Snell’s law of refraction.

Define wavefront. Draw the shape of refracted wavefront when the plane incident wave undergoes refraction from optically denser medium to rarer medium. Hence prove Snell’s law of refraction.

ANS 7 A locus of points, which oscillate in phase is called a wavefront.

A wavefront is defined as a surface of constant phase.

Diagram Proof nଵ sin i = nଶ sin r (Derivation) This is the Snell’s law of refraction.