Optics 4 Question 9
9. A ray of light is incident on an equilateral glass prism placed on a horizontal table. For minimum deviation which of the following is true?
$(2004,2 M)$
(a) $P Q$ is horizontal
(b) $Q R$ is horizontal
(c) $R S$ is horizontal
(d) Either $P Q$ or $R S$ is horizontal
Show Answer
Answer:
Correct Answer: 9. (b)
Solution:
- During minimum deviation the ray inside the prism is parallel to the base of the prism in case of an equilateral prism.
