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NEET 2018
Exam
NEET
Year
2018
Subject
Physics
Chapter
Wave Optics

NEET 2018 · Physics · Wave Optics

Unpolarised light is incident from air on plane surface of a...

Unpolarised light is incident from air on plane surface of a material of refractive index μ\mu. At a particular angle of incident ii it is found that the reflected and refracted rays are perpendicular to each other. Which of the following options is correct for this situation?Unpolarised light is incident from air on plane surface of a material of refractive index μ . At a particular angle of

Options

  1. Ai=sin⁡−1(1μ)i = \sin^{- 1} \left(\dfrac{1}{\mu}\right)
  2. BReflected light is polarized with its electric vector perpendicular to the plane of incidence
  3. CReflected light is polarized with its electric vector parallel to the plane of incident
  4. Di=tan⁡−1(1μ)i = \tan^{- 1} \left(\dfrac{1}{\mu}\right)

Correct answer

B. Reflected light is polarized with its electric vector perpendicular to the plane of incidence

Step-by-step solution

Unpolarised light is incident from air on plane surface of a material of refractive index μ . At a particular angle of

when reflected light rays and reflected rays are perpendicular, reflected light is polarised with electric field vector perpendicular to the plane of incidence.
Also. Brewster's law μ=tani\mu = tani.
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