Question

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

Answer 1

Answer:

Explanation:$ur answer$

The angle of deviation of a ray of light in passing through a prism not only depends upon its material but also upon the angle of incidence. The above figure shows the nature of variation of the angle of deviation with the angle of incidence. It is clear that an angle of deviation has the minimum value $δ_m$ for only one value of the angle of incidence. The minimum value of the angle of deviation when a ray of light passes through a prism is called the angle of minimum deviation.

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