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JEE Main202228 Jul 2022Morning ShiftPhysicsRay OpticsActual

As shown in the figure, after passing through the medium 1 . The speed of light v 2 in medium 2 will be : (Given c = 3 × 10 8 m s - 1 )

Options

  1. A1 . 0 × 10 8   m   s - 1
  2. B0 . 5 × 10 8   m   s - 1
  3. C1 . 5 × 10 8   m   s - 1
  4. D3 . 0 × 10 8   m   s - 1

Correct answer

A. 1 . 0 × 10 8   m   s - 1

Step-by-step solution

The refractive index of a medium is given by, n = μ r ε r . For medium 2 , n 2 = 1 × 9 = 3 Now speed of light in a medium will be, c v = n ⇒ v = 3 × 10 8 3 = 1 × 10 8   m   s - 1

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