Question

The polarizing angle of glass is $57^{\circ }$. A ray of light which is incident at this angle will have an angle of refraction as

• A. 25${}^{\circ }$
• B. 33${}^{\circ }$
• C. 43${}^{\circ }$
• D. 38${}^{\circ }$

Answer 1

Answer: (B)

Given, ${\theta }_P=57^{\circ }$
According to Brewster's law, we have
${\theta }_P+r=90^{\circ }$
$\Rightarrow r=90^{\circ }-{\theta }_P$
$r=90^{\circ }-57$
Angle of refraction, $I=33^{\circ }$