A light ray of a single wavelength is incident on the prism. The emergent light is best described by a:

spectrum of component colours.

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laterally shifted ray of same wavelength.

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light ray of same wavelength deviated by an angle.

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light ray of different wavelength deviated by an angle.

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Solution

The correct option is C light ray of same wavelength deviated by an angle.
When the light ray of a single wavelength is incident on the prism, it cannot be split into further colours.
Wavelength of emergent ray does not change since final medium is air.
It is deviated by an angle due to the refraction through prism.

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