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Q.

The angle of deviation through a prism is minimum when

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(A) Incident ray and emergent ray are symmetric to the prism
(B) The refracted ray inside the prism becomes parallel to its base
(C) Angle of incidence is equal to that of the angle of emergence
(D) When angle of emergence is double the angle of incidence
Choose the correct answer from the options given below:
 

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a

Statements (A), (B) and (C) are true

b

Only statements (A) and (B) are true

c

Only statement (D) is true

d

Statements (B) and (C) are true

answer is D.

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Detailed Solution

δ= i+ e - Aif δ→minimum,then i=e,  r1= r2∴A,B,C are correct

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