question_answer

A ray of light is moving from air into medium. If the angle of incidence in air is \[{{45}^{o}}\] and angle of refraction is \[{{30}^{o}}\], then find the refractive index of the medium.

Answer:

We know that \[\mu =\frac{\sin i}{\sin r}\] \[\mu =\frac{\sin 45}{\sin 30}=\frac{{}^{1}/{}_{\sqrt{2}}}{{}^{1}/{}_{2}}=\sqrt{2}=1.414\]