Question

In Youngs double slit experiment with monochromatic lights, how is the fringe-width affected if the separation between the two slit is decreased
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Answer 1

Answer:

So, width of the fringes gets decreased if the distance between the slits (d) is increased and thus we get narrower fringes. How satisfied are you with the answer?

Answer 2

Answer:

So if monochromatic light in Young's double-slit experiment is replaced by white light, then the waves of every wavelength form their separate interference patterns. ... Hence the waves of all colors reach a middle point R in the same phase. So the central fringe is white