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Questions  

In the diagram shown, a plot between δ (angle of deviation) versus i (angle of incidence) for a triangular prism is given. From the observed plot, some conclusion can be drawn. Mark out the correct conclusion. 

a
The range of deviation for which two angles of incidence are possible for same deviation is δ0-δm
b
The curve is asymmetrical about i0
c
For a given δ, i is unique
d
Both 1 and 2 are correct.

detailed solution

Correct option is D

The graph is asymmetrical about i0 the section to the left of i0 being steeper than the section to the right.

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ABC is an isosceles right angled triangle with the angle BAC 90o. A ray of light parallel to the base BC strikes the face AB.  The refracted ray in the prism strikes the base BC. If the refractive index of the material of the prism is 2, find the total angle of deviation of the final emergent ray


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