Question

If a light ray incident normally on one of the faces of the prism of refractive index 2 and emergent ray just grazes the second face of the prism, then the angle of deviation is

• A. $0^o$
• B. ${30}^o$
• C. ${60}^o$
• D. ${90}^o$

Answer 1

The correct option is C ${60}^o$

REF.Image

${\Theta }_c=si{n}^{-1}\frac{1}{2}$

$=\frac{x}{6}$

Ans $\frac{x}{3}$