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PhysicsNEET 2024Diffraction and polarisation

Wave Optics

An unpolarised light beam strikes a glass surface at Brewster's angle. Then:

  1. A.The refracted light will be completely polarised.
  2. B.Both the reflected and refracted light will be completely polarised.
  3. C.The reflected light will be completely polarised but the refracted light will be partially polarised.✓
  4. D.The reflected light will be partially polarised.

Solution

At Brewster's angle the reflected light is completely plane-polarised (electric vector perpendicular to the plane of incidence), while the refracted beam contains both components and is only partially polarised.

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