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MHT CET202615 April 2026Evening ShiftPhysicsRay OpticsActual

In the phenomenon of refraction of light for the same angle of incidence

Options

  1. Aangle of refraction is same for different colours.
  2. Bangle of refraction is different for different colours.
  3. Cangle of refraction does not depend upon the colour of the light used.
  4. Dangle of refraction depends on critical angle.

Correct answer

B. angle of refraction is different for different colours.

Step-by-step solution

According to Snell's law, i r = , where is the refractive index of the medium. The refractive index of a medium depends on the wavelength of light according to Cauchy's relation = A + B ^2 . Since different colours of light have different wavelengths, the refractive index is different for different colours. Therefore, for a given angle of incidence i , the angle of refraction r will be different for different colours. Answer: angle of refraction is different for different colours.

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