JEE PHYSICS MCQ: WAVE OPTICS

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What is the effect on Fresnel’s biprism experiment when the use of white light is made

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Correct option: C

Central fringe is white and all are coloured

Option C (Central fringe is white and all are coloured) is correct because with white light, the central fringe has zero path difference, resulting in white, while other fringes are colored due to different wavelengths.

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