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Solution


Q.

If the monochromatic source in Young’s double slit experiment is replaced by white light, then              [2024]
1 interference pattern will disappear.  
2 there will be a central dark fringe surrounded by a few coloured fringes.  
3 there will be a central bright white fringe surrounded by a few coloured fringes.  
4 all bright fringes will be of equal width.  

Ans.

(3)

If the monochromatic source in YDSE is replaced by white light, the central fringe will be a bright white fringe. This fringe will be surrounded by a few coloured fringes.