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A ray of light when refracted suffers change in velocity. In this context, which one among the following statements is correct ?

Options

  1. AVelocity increases as the ray passes from a rarer to a denser medium
  2. BVelocity decreases as the ray passes from a denser to a rarer medium
  3. CVelocity decreases as the ray passes from a rarer to a denser medium
  4. DChange of velocity does not depend on the nature of medium

Correct answer

C. Velocity decreases as the ray passes from a rarer to a denser medium

Step-by-step solution

As we know refractive index = velocity of light in vaccum velocity of light in medium . The velocity of light decreases as the ray passes from a rarer to a denser medium.

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