Archive
14th of March 2017
Physics
Q:

why emergent ray is parallel to incident ray in rectangular glass slab but not in prism?

Priya Dharshini - CBSE - Class X

Tuesday, March 14, 2017 at 18:06:PM

A:

Hi,

This is because in the case of the glass slab the surfaces (on which light is incident and emerging) are opposite and parallel to each other. Whereas, in the case of a glass prism the surfaces are inclined to each other at some angle.

Tuesday, March 14, 2017 at 18:30:PM