Question

(a) Write the necessary conditions for the phenomenon of total internal reflection to occur.(b) Write the relation between the refractive index and critical angle for a given pair of optical media.

Answer 1

➡Total internal reflection is the phenomenon which occurs when a propagated wave strikes a medium boundary at an angle larger than a particular critical angle with respect to the normal to the surface.

➡Total internal reflection of light can be demonstrated using a semi-circular block of glass or plastic.