Question

A ray of light incident at an angle ${48}^0$ on a prism of refracting angle ${60}^0$ suffers minimum deviation. Calculate the angle of minimum deviation.

• A. ${46}^0$
• B. ${36}^0$
• C. ${50}^0$
• D. ${60}^0$

Answer 1

The correct option is B ${36}^0$

$i={48}^0$
$A={60}^0$
${\delta }_m=?$
Form ${\delta }_m=2i-A$
${\delta }_m=2\times 48-60$
$={96}^0-{60}^0={36}^0$