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Geometrical Optics question

2023 · Q139
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Geometrical Optics question

2023 · Q139

NEETPhysicsGeometrical OpticsMCQ+4 / −1

Light travels a distance x\mathrm{x}x in time t1t_{1}t1​ in air and 10x10 \mathrm{x}10x in time t2t_{2}t2​ in another denser medium. What is the critical angle for this medium?

  1. A
    sin⁡−1(10t2t1)\sin ^{-1}\left(\frac{10 \mathrm{t}_{2}}{\mathrm{t}_{1}}\right)sin−1(t1​10t2​​)
  2. B
    sin⁡−1(t110t2)\sin ^{-1}\left(\frac{t_{1}}{10 t_{2}}\right)sin−1(10t2​t1​​)
  3. C
    sin⁡−1(10t1t2)\sin ^{-1}\left(\frac{10 t_{1}}{t_{2}}\right)sin−1(t2​10t1​​)
  4. D
    sin⁡−1(t2t1)\sin ^{-1}\left(\frac{t_{2}}{t_{1}}\right)sin−1(t1​t2​​)
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