Question

A narrow beam of white light goes through a slab having parallel faces.
(a) The light never splits in different colours
(b) The emergent beam is white
(c) The light inside the slab is split into different colours
(d) The light inside the slab is white

Answer 1

Answer:

c

Explanation:

the light inside the slab id split into different colour because of despersation of light

Answer 2

A narrow beam of white light goes through a slab having parallel faces that, the emergent beam is white  and the light inside the slab is white.

Explanation:

The light inside of the slab is specifically divided into different colors. The light arising from a single white ray is a beam of different colors, similar to the ray incident. The emerging beam however is thin, because the white rays similar to the white ray above are often split into different colors that add up to those wavelengths to create a white light beam identical to the white beam incident.  

Thus, the option (b) and (c) is the correct answer.