A laser beam in air strikes the surface of a clear solid at an angle of to the normal

PHYSICS · Subjective · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction

Problem

A laser beam in air strikes the surface of a clear solid at an angle of

40^{\circ}

to the normal. Inside the solid the beam makes an angle of

25^{\circ}

to the normal. Determine the optical index of the solid.