Home » Ask Physics » Refraction through Prism – A Question

Subscribe to this site by email

Loading

Refraction through Prism – A Question

A light ray falls perpendicular to one of the faces of a glass prism of angle 60 and refractive index 1.5,
Find;
a) the angle of emergence.
b) the angle of deviation.
Answer:
The question implies that the angle of incidence is 0
The ray will enter without any deviation. Therefore, the angle of incidence at the second face inside the prism = 60 degree
(From A +90+ (90-r2)=180)
Since the critical angle for glass is less than this, the ray of light will undergo total internal reflection. So it reflects towards the base internally.

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Hits so far @ AskPhysics

  • 2,240,411 hits

Subscribe to AskPhysics via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 4,336 other subscribers

October 2020
M T W T F S S
 1234
567891011
12131415161718
19202122232425
262728293031  

Schrodinger’s Cat in Daily Life

%d bloggers like this: