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PhysicsNEET 2023Total internal reflection and prisms

Ray Optics and Optical Instruments

Light travels a distance xx in time t1t_1 in air and 10x10x in time t2t_2 in another denser medium. What is the critical angle for this medium?

  1. A.sin⁡−1(t2t1)\sin^{-1}\left(\dfrac{t_2}{t_1}\right)
  2. B.sin⁡−1(10 t2t1)\sin^{-1}\left(\dfrac{10\,t_2}{t_1}\right)
  3. C.sin⁡−1(t110 t2)\sin^{-1}\left(\dfrac{t_1}{10\,t_2}\right)
  4. D.sin⁡−1(10 t1t2)\sin^{-1}\left(\dfrac{10\,t_1}{t_2}\right)✓

You have the answer. The worked solution — and why the other three were written — is part of a paid pack.

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