Question 261 of 295

The angle of deviation through a prism is minimum when

(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 :

AStatements (A),(B) and (C) are trueBOnly statement (D) is trueCOnly statements (A) and (B) are trueDStatements (B) and (C) are true

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

As per the figure given in question, we are considering it an Isosceles Prism.
Deviation is minimum in a prism when :
$i=e,{r}_{1}={r}_{2}$ and ray $\left(2\right)$ is parallel to base of prism.