A) 1.5
B) 2
C) 2?1
D) 3?1/2
Correct Answer: D
Solution :
From graph it is clear that \[\tan {{30}^{o}}=\frac{\sin r}{\sin i}\] Þ \[\frac{1}{\sqrt{3}}=\frac{\sin r}{\sin i}=\frac{1}{\mu }\] Þ \[\mu =\sqrt{3}\] Also \[v=\frac{c}{\mu }=nc\] Þ \[n=\frac{1}{\mu }=\frac{1}{\sqrt{3}}={{(3)}^{-1/2}}\]
You need to login to perform this action.
You will be redirected in
3 sec
