Single Choice

Which of the following graphs will represent the angle of deviation $$\delta$$ by a versus angle of incident $$i$$ for a monochromatic light ?

A
B
C
D
Correct Answer

Solution

It has been found experimentally that as we increase the angle of incidence first the angle of deviation first decreases, reaches to a minimum value and then again increases.
The angle of incidence at which the deviation is minimum is called the minimum deviation position and the angle of deviation is called angle of minimum deviation $$\delta_m$$
Under such a condition the rays travel parallel to the base inside the prism.
So the correct graph is D

SIMILAR QUESTIONS

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Pick the wrong answer in the context with rainbow.

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Consider the ray diagram for the refraction given below. The maximum value of angle 6 for which the light suffers total internal reflection at the vertical surface, is

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