Is it true that when a monochromatic light having one wavelength passes through a prism, it will show dispersion?

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True

False

answer is B.

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Detailed Solution

The above statement is false.
When monochromatic light passes through a prism, the ray of light gets bent by some amount. So, when a ray of light enters into the prism, it is bent by a certain amount, and we will see exactly that same colour that comes back out. Therefore, monochromatic light passing through a prism can be deviated due to differences in the medium but cannot be dispersed since it contains waves of a single wavelength, unlike white light.
A monochromatic light having one wavelength does not show any dispersion while passing through a prism. It will only show deviation.

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