Question

The refractive index of a medium is \(\sqrt{3}\). The angle of incidence for which the angle of refraction is \(30^\circ\) is:

• A. \(30^\circ\)
• B. \(45^\circ\)
• C. \(60^\circ\)
• D. \(90^\circ\)

Hint:

Use Snell’s law: \(n=\sin i/\sin r\).

Answer 1

The Correct Option is C

By Snell’s law, \[ n=\frac{\sin i}{\sin r} \Rightarrow \sin i=\sqrt{3}\sin30^\circ=\frac{\sqrt{3}}{2} \] \[ i=60^\circ \]