NEET Solved Paper 2018 Question 8
Question: Unpolarised light is incident from air on a plane surface of a material of refractive index $ ‘\mu ’ $ . At a particular angle of incidence ‘i’, it is found that the reflected and refracted rays are perpendicular to each other. Which of the following options is correct for this situation? [NEET - 2018]
Options:
A) $ i={{\sin }^{-1}}( \frac{1}{\mu } ) $
B) Reflected light is polarised with its electric vector perpendicular to the plane of incidence
C) Reflected light is polarised with its electric vector parallel to the plane of incidence
D) $ i={{\tan }^{-1}}( \frac{1}{\mu } ) $
Show Answer
Answer:
Correct Answer: B
Solution:
- When reflected light rays and refracted rays are perpendicular, reflected light is polarised with electric field vector perpendicular to the plane of incidence. Also, $ \tan \text{ i=}\mu $ (Brewster angle)
