Is it true that a glass slab is able to produce a spectrum when white light passes through it but a glass prism does not produce any spectrum?

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True

False

answer is B.

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Detailed Solution

The above statement is False.
A spectrum is a band of colours seen when a light ray splits into its constituent colours due to refraction. In a glass slab, the light ray has to pass through two interfaces which are parallel to each other. So, when the light forms a spectrum from the first interface, the second interface converges the light rays, and a single white light emerges, and the spectrum is not formed. But in glass prisms, the interfaces through which the light will pass are not parallel; hence, a spectrum of different colours can be seen.
The correct statement would be that a glass prism is able to produce a spectrum when white light passes through it but a glass slab does not produce any spectrum.

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