Physics

Problem

The speed of light in media 'A' and 'B' are

2.0 \times 10^{10}

cm/s and

1.5 \times 10^{10}

cm/s respectively. A ray of light enters from the medium B to A at an incident angle '

\theta

'. If the ray suffers total internal reflection, then (a)

\theta = \sin^{-1}\left(\frac{3}{4}\right)

(b)

\theta > \sin^{-1}\left(\frac{2}{3}\right)

(c)

\theta < \sin^{-1}\left(\frac{3}{4}\right)

(d)

\theta > \sin^{-1}\left(\frac{3}{4}\right)