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Question

# A ray of light suffers refraction through equilateral prism. The deviation produced by the prism does not depend on the :

A
angle of incidence.
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B
colour of light.
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C
material of prism.
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D
size of prism.
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Solution

## The correct option is B size of prism.The deviation in a prism depends upon:Refractive index of the prism- The refractive index depends on the material and the wavelength of the light. The larger the refractive index, the larger the deviation angle.Angle of the prism- The larger the prism angle, the larger the deviation angle.Angle of incidence- The deviation angle depends on the angle that the beam enters the object, called angle of incidence. The deviation angle first decreases with increasing incidence angle, and then it increases.It does not depend on the size of the prism.

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