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Q.

How is the angle of emergence $i_{2}$ related to the angle of incidence $i_{1}$ ?

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a

i_{2} = i_{1}

b

i_{2} < i_{1}

c

i_{2} > i_{1}

d

Can’t say

answer is A.

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Detailed Solution

Concept: Consider a glass block with opposite sides parallel placed in air, as illustrated in figure, to find the relationship between the angle of incidence and the angle of emergence.
A ray of light incident at an angle of incidence I travels through an equilateral glass prism so that the refracted ray within the prism is parallel to its base and emerges from the prism at an angle of emergence 'e' is depicted in the diagram. Here, in this case, angle of incident∠i=angle of emergence∠e.
Question Image

Question Image

Hence, the correct option is 1.

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