NEET Solved Paper 2019 Question 39
Question: In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will angle of refraction? [NEET 5-5-2019]
Options:
A) Equal to angle of incidence
B) $ 90{}^\circ $
C) $ 180{}^\circ $
D) $ 0{}^\circ $
Show Answer
Answer:
Correct Answer: B
Solution:
In TIR If $ i={\theta _{cr}} $
$ r=90{}^\circ $
