First slide

Coherent sources and their importance in interference

Question

In Young’s double slit experiment, the central bright fringe can be identified

Easy

A

By using white light instead of monochromatic light
B

As it is narrower than other bright fringes
C

As it is wider than other bright fringes
D

As it has a greater intensity than the other bright fringes

Solution

When white light is used, central fringe will be white with red edges, and on either side of it, we shall get few coloured bands and then uniform illumination.

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