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Q.

In the dispersion of white light by a prism, the red colour deviates the:

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a

Neutrally

b

Parallel

c

Most

d

Least

answer is B.

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Detailed Solution

The deviation in the path of the light is inversely proportional to the wavelength. The red colour has the longest wavelength. Hence, during dispersion, red light suffers the least amount of deviation and violet deviates the most due to the shortest wavelength. 

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In the dispersion of white light by a prism, the red colour deviates the: