Question

(a) Derive an expression for the refractive index of the material of the prism in terms of the angle of the prism and angle of minimum deviation. b) Draw a graph showing variation of angle of deviation with angle of incidence.
(c) A ray of light passes the through an equilateral prism (n=1.5) such that the angle of incidence is equal to angle of emergence which is equal to 3/4th of angle of prism. Calculate angle of deviation.
OR
(a) Define limit of resolution and resolving power of an optical instrument. How are they related?
(b) Find expressions for resolving power of a telescope and a microscope.
(c) Assume light of wavelength 6000Å is coming from a star. What is the limit of resolution of a telescope whose objective has diameter of 100 inch.

Answer 1

Answer:

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Answer 2

Explanation:

The refractive index of prism is about its critical angle