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Most Important Selected Qs for JEE AdvancedPhysicsRay Optics

An equilateral prism PQR is placed in air with its base QR lying horizontally in yz plane as shown. A ray moving along 3 x+z=10 is incident at a point A on face P Q of prism

Options

  1. ARefractive index of prism's material for which the ray emerges grazing out of face PR is 2 3
  2. BRefractive index of prism's material for which the ray emerges grazing by out of face PR is 3
  3. CIf refractive index of prism's material is 2, ray emerges out of the prism parallel to x -axis
  4. DIf refractive index of prism's material is 1.6 , ray emerges out of the prism parallel to z -axis

Correct answer

C. If refractive index of prism's material is 2, ray emerges out of the prism parallel to x -axis

Step-by-step solution

Ray is incident normally on face. 60^ 90^ = 1 = 2 3 .

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