If white light is used in a Young's double-slit experiment, then

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the first-order red fringes are closer to the centre of the screen than the first order violet fringes

the first-order violet fringes are closer to the centre of the screen than the first order red fringes

bright white fringe is formed at the centre of the screen

fringes of different colors are observed clearly only in the first order

answer is A, B, C.

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Detailed Solution

Bright central fringe is formed due to all the colors , and the central bright fringe will be white . Fringes of different colors are observed clearly only in the first order as bright fringes of different colours other than first order will overlap. The first-order violet fringes are closesr to the center of the screen than the first-order red fringes as the wavelength of violet is small .

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