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Concepts Of Physics MCQ Edition [Volume 1]PhysicsLight Waves

In a certain liquid, the speed of yellow light is 2.4 10^8 m s ⁻¹ . Determine the refractive index of the liquid.

Options

  1. A1.25
  2. B1.33
  3. C1.50
  4. D0.80

Correct answer

A. 1.25

Step-by-step solution

The refractive index of a medium is given by the ratio of the speed of light in vacuum to the speed of light in the medium. n = c v Given the speed of yellow light in the liquid, v = 2.4 10^8 m s ⁻¹ The speed of light in vacuum is c = 3.0 10^8 m s ⁻¹ Substituting the values: n = 3.0 10^8 2.4 10^8 n = 3.0 2.4 = 5 4 = 1.25

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