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PhysicsNEET 2019Total internal reflection and prisms

Ray Optics and Optical Instruments

In total internal reflection, when the angle of incidence is equal to the critical angle for a pair of media in contact, what will the angle of refraction be?

  1. A.180∘180^\circ
  2. B.0∘0^\circ
  3. C.Equal to the angle of incidence
  4. D.90∘90^\circ✓

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