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How does the angle of minimum deviation ...

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

Text Solution

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`"We know", lambda_(red)gt lambda_("violet") and mu = A + (B)/(lambda_(2))`
[where A and B constanta]
So, for the increase of wavelength refractive index of the material for different coloured ray decreases.
`therefore " " mu_(red) lt mu_("violet")`
`"Since", mu = (sin""(A + delta_(m))/(2))/(sin""(A)/(2))`
`therefore " " (delta_(m))_(red) lt (delta_(m))_("violet")`
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