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PhysicsJEE Main 4 Apr 2026, Shift 1·Q20·MCQ·Moderate

Wave Optics · Diffraction and polarisation

An unpolarized light is incident on the plane interface of air-dielectric medium shown in figure. If the incident angle is equal to Brewster angle, identify the expression representing reflected wave.
  1. (1)Eyj^sin⁡(kx−kz−ωt)E_y\hat j\sin(kx - kz - \omega t)
  2. (2)(Exi^+Ezk^)sin⁡(kx+ky−ωt)(E_x\hat i + E_z\hat k)\sin(kx + ky - \omega t)
  3. (3)(Eyj^+Ezk^)sin⁡(ky+kz−ωt)(E_y\hat j + E_z\hat k)\sin(ky + kz - \omega t)
  4. (4)(Exi^+Eyj^+Ezk^)sin⁡(kx+ky−kz−ωt)(E_x\hat i + E_y\hat j + E_z\hat k)\sin(kx + ky - kz - \omega t)
We corrected a printing error in the original paper

Source printed option (1) as “(Exi^+Eyj^)sin⁡(kx−kz−ωt)(E_x\hat i + E_y\hat j)\sin(kx - kz - \omega t)”; corrected to the intended “Eyj^sin⁡(kx−kz−ωt)E_y\hat j\sin(kx - kz - \omega t)” (at the Brewster angle the reflected light is polarised perpendicular to the plane of incidence xzxz, and an Exi^E_x\hat i component is not transverse to the reflected direction); source printed option (3) as “(Exj^+Eyk^)(E_x\hat j + E_y\hat k)”.

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