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MHT CET Physics question

PhysicsWave OpticsMHT CET

A ray of light from a monochromatic point source of light is incident at a point on the screen. If a thin mica film of thickness 't' and refractive index 'n' is introduced in its path, then the optical path [MHT-CET 2021]

Answer: (C)

Solution

Optical path through the film is in place of , so the optical path increases by

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Question ID VK-077522