Write deviation formula for prism.

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Angle of minimum deviation for a prism of refractive index 1.5 is equal to the angle of prrism.The angle of prism is

Prism A prism is a portion of transparent refracting medium bounded by two plane surfaces inclined to each other at a certain angle, and the angle between the refracting faces is called angle of the prism denoted by A. The deviation produced by the prism is maximum for violet (delta_v) and minimum for red (delta_r) colour. For minimum deviation through a prism. we have

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Define the term dispersion by a prism and give the reason for its occurrence .Write the formula for refractive index of the material of a prism in terms of the anle ofminimum deviation.