Question 257: Ray Optics

Question

The refractive index of a glass is $$1.520$$ for red light and $$1.525$$ for blue light. Let $${D_1}$$ and $${D_2}$$ be angles of minimum deviation for red and blue light respectively in a prism of this glass. Then,

Accepted Answer

For a thin prism, $$D = \left( {\mu  - 1} \right)A$$
Since $${\lambda _b} < {\lambda _r} \Rightarrow {\mu _r} < {\mu _b} \Rightarrow {D_1} < {D_2}$$

Answer

$${D_1} < {D_2}$$

Answer

$${D_1} = {D_2}$$

Answer

$${D_1}$$ can be less than or greater than $${D_2}$$ depending upon the angle of prism

Answer

$${D_1} > {D_2}$$

Ray Optics

The refractive index of a glass is $1.520 for red light and 1.525 for blue light. Let {D_1} and {D_2}$ be angles of minimum deviation for red and blue light respectively in a prism of this glass. Then,

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