MCQ
Optics: dispersion through prism MCQ - Practice Questions with Answers
Solve 1 Optics: dispersion through prism questions for RAS/RPSC preparation.
Practice questions
Q1When a narrow beam of sunlight is incident on a glass prism, the emergent light is seen to consist of seven colours. In the emergent light:
Explanation
In a glass prism, dispersion occurs because different colours travel with different refractive indices. Violet light has a shorter wavelength and is refracted more strongly, so it bends the most. Red light has a longer wavelength and is refracted less, so it bends the least. Saying that red bends the most reverses the actual order. Equal bending would mean no dispersion into seven colours. Saying that no bending occurs ignores refraction through the prism itself.
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