Q.

Which colour of light shows maximum deviation when passed through a prism?

A. White
B. Red
C. Violet
D. Green
Answer» C. Violet
Explanation: The angle of deviation, by which the light of a particular wavelength gets deviated on passing through a medium, depends upon the refractive index of the medium, as encountered by that light wavelength. The smaller the wavelength of the passing light, the greater is the refractive index observed.
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