Home Physics Electromagnetic Wave NEET Previous Years Question If the monochromatic source in Young's doubl…
Physics Electromagnetic Wave NEET Previous Years Question MCQ (Single Correct)

If the monochromatic source in Young's double slit experiment is replaced by white light, then [NEET 2024]

A
interference pattern will disappear
B
there will be a central dark fringe surrounded by a few coloured fringes
C
there will be a central bright white fringe surrounded by a few coloured fringes
D
all bright fringes will be of equal width

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The correct answer is:
C

When YDSE is performed in white light instead of monochromatic light, all wavelengths show their maxima and minima in orders of their wavelength. At central point on screen, path difference is zero for all wavelengths. Thus a central bright fringe is observed along with few fringes that will be different colours.

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