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Unpolarised light is incident from air on plane surface of a material of refractive index μ. At a particular angle of incident i it is found that the…

NEET UG 2018 — Physics Optics

2018mcqhard

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

Official previous-year question

Held on 30 Apr 2018 · Verified 9 Jul 2026.

Options

  1. A

    i=sin−1(1μ)i={\mathrm{sin}}^{-1}(\frac{1}{\mu })i=sin−1(μ1​)

  2. B

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

  3. C

    Reflected light is polarized with its electric vector parallel to the plane of incident

  4. D

    i=tan−1(1μ)i={\mathrm{tan}}^{-1}(\frac{1}{\mu })i=tan−1(μ1​)

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