When an unpolarized light falls at a particular angle on a glass plate (placed in air), it is observed that the reflected beam is linearly polarized. The angle of refracted beam with respect to the normal is $\_\_\_\_$.
$\left(\tan ^{-1}(1.52)=57.7^{\circ}\right.$, refractive indices of air and glass are 1.00 and 1.52, respectively.)

• A

  $39.6^{\circ}$
• Correct answer
  B

  $32.3^{\circ}$
• C

  $36.3^{\circ}$
• D

  $42.6^{\circ}$

Solution

$\tan i = \dfrac{\mu_2}{\mu_1} = \dfrac{\mu_g}{\mu_a}$
$\tan i = 1.52$
$i = 57.7°$
$r = 90° - i$
$r = 32.3°$

Hence, the correct answer is option: 'B'.