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How does the angle of minimum deviation of a glass prism vary if the incident violet light is replaced by red light? - Physics

Short Note

How does the angle of minimum deviation of a glass prism vary if the incident violet light is replaced by red light?

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Solution

 Hence relative refractive index between the prism and red light is less than the relative refractive index between the prism and violet light.

The angle of minimum deviation is directly proportional to the relative refractive index by the relation:-

δ = (μ−1)A    (where A is the angle of the prism)

Therefore the angle of minimum deviation for red light is less than the violet.

Concept: Dispersion by a Prism
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