Optics Question 803

Question: A glass prism of refractive index 1.5 is immersed in water (refractive index 4/3). A light beam incident normally on the face AB is totally reflected to reach on the face BC if

Options:

A) $ \sin \theta \ge \frac{8}{9} $

B) $ \frac{2}{3}<\sin \theta <\frac{8}{9} $

C) $ \sin \theta \le \frac{2}{3} $

D) $ \frac{1}{2}<\sin \theta <1 $

Show Answer

Answer:

Correct Answer: A

Solution:

[a] The phenomenon of total internal reflection takes place during reflection at P.



NCERT Chapter Video Solution

Dual Pane