Question

A small angled prism of refractive index $1.6$ gives a deviation of ${3.6}^o$. The angle of prism is _________.

• A. $7^o$
• B. $6^o$
• C. $5^o$
• D. $8^o$

Answer 1

Answer: (B)

$6^o$

Given : $\mu =1.6$ $\delta ={3.6}^o$
Using $\delta =(\mu -1)A$
We get $3.6=(1.6-1)A$
$⟹A=6^o$
Correct answer is option B.