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Wave Optics question

2018 · Q131
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Wave Optics question

2018 · Q131

NEETPhysicsWave OpticsMCQ+4 / −1
Unpolarised light is incident from air on a plane surface of a material of refractive index μ\muμ. 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?
  1. A
    Reflected light is polarised with its electric vector parallel to the plane of incidence
  2. B
    Reflected light is polarised with its electric vector perpendicular to the plane of incidence
  3. C
    i=sin⁡−1(1μ)i = {\sin ^{ - 1}}\left( {{1 \over \mu }} \right)i=sin−1(μ1​)
  4. D
    i = tan-1(1μ)\left( {{1 \over \mu }} \right)(μ1​)
View written solutionFree

Correct answer: B

If reflected and refracted light rays are perpendicular, reflected light gets polarised with electric field vector perpendicular to the plane of incidence.

NEET 2018 Physics - Wave Optics Question 16 English Explanation


Also, tan i = μ\mu μ (i = Brewster's angle)

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