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JEE Advanced2007PhysicsRay OpticsActual

Paragraph: The figure shows a surface X Y separating two transparent media, medium-1 and medium-2. The lines a b and c d represent wavefronts of a light wave travelling in medium-1 and incident on X Y . The lines ef and g h represent wavefronts of the light wave in medium-2 after refraction. Question: Speed of light is

Options

  1. Athe same in medium-1 and medium-2
  2. Blarger in medium-1 than in medium-2
  3. Clarger in medium-2 than in medium-1
  4. Ddifferent at b and d

Correct answer

B. larger in medium-1 than in medium-2

Step-by-step solution

In medium-2 wavefront bends away from the normal after refraction. Therefore, ray of light which is perpendicular to wavefront bends towards the normal in medium-2 during refraction. So, medium-2 is denser or its speed in medium-1 is more. Hence, option (b) is correct.

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