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The refractive indices of two media, are denoted by n ₁ and n ₂ , and the velocities of light in these two media are respectively v₁ and v₂ . If n₂ / n₁ is 1.5 , which one of the following statements is correct?

Options

  1. Av₁ is 1.5 times v₂ .
  2. Bv ₂ is 1.5 times v ₁ .
  3. Cv₁ is equal to v₂ .
  4. Dv₁ is 3 times v₂ .

Correct answer

A. v₁ is 1.5 times v₂ .

Step-by-step solution

Refractive index of medium 2 w . r. t. mediuml is given by n ₂= Speed of light in medium 1 / Speed of light in medium 2= v ₁ / v ₂=1.5 hence, v₁=1.5 v₂

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