Question

A very thin narrow beam of white light is made incident on one face of rectangular glass slab and one face of the combination of two prisms , one up and one down in contact . comment on the nature of behaviour of the emergent beam in two cases

Answer 1

Answer:

Explanation:

1)When the ray of white light is incident on a rectangular glass slab, it refracts and the emergent beam of light is parallel to the incident ray

2)When the ray of light passes through the combination of prisms,it first splits into 7 colors and when it meets the second prism it RECOMBINES.The emergent ray at first is not parallel but after it passes the second prism it becomes parallel to the incident ray of light.