The deviation is maximum for which colour ?
Text Solution
Verified by ExpertsThe correct answer is:
A
we know that wavelength of violet light is minimum and that of red light is maximum.
∴ λ R > λ v
From Cauchy’s dispersion relation
μ ∝ 
So, μ v > μ R , ie, refractive index of glass for violet light is maximum.
Hence, from the formula
δ m = ( μ – 1) A
where δ m is angle of deviation and A the angle of prism, violet light deviates the most and red the least.
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