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The variation of refractive index of a crown glass thin prism with wavelength of the incident light is shown. Which of the following graphs is the correct one, if Dm is the angle of minimum deviation?

 

(a)

(b)

(c)

(d)


Question ID - 50311 | Top Ranker Answer | SaraNextGen

The variation of refractive index of a crown glass thin prism with wavelength of the incident light is shown. Which of the following graphs is the correct one, if Dm is the angle of minimum deviation?

 

(a)

(b)

(c)

(d)

1 Answer - 5876 Votes

3537

Answer Key : (b) -

Since Dm=(μ−1)A & on increasing the wavelength, μ decreases & hence Dm decreases.

Therefore correct answer is (b)



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