JEE Main On 16 April 2018 Question 27
Question: A ray of light is incident at an angle of $ 60^{o} $ on one face of a prism of angle $ 30^{o}. $ The emergent ray of light makes an angle of with incident ray. The angle made by the emergent ray with second face of prism will be: [JEE Main 16-4-2018]
Options:
A) $ 30^{o} $
B) $ 90^{o} $
C) $ 0^{o} $
D) $ 45^{o} $
Show Answer
Answer:
Correct Answer: B
Solution:
Here $ i _1=60 $ $ A=30 $
$ \delta =30 $ Since, $ \delta =i _1+i _2-A $ $ i _2=0 $ So from the surface, it will make.
