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KCET2023PhysicsRay Optics

For a given pair of transparent media, the critical angle for which colour is maximum?

Options

  1. AGreen
  2. BRed
  3. CBlue
  4. DViolet

Correct answer

B. Red

Step-by-step solution

Red light has the longest wavelength and the smallest refractive index within the visible region. Thus, it bends least when passing from glass to air. As a result, its critical angle is maximum.

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