Q. 15

The slits in a Young’s double slit experiment have equal width and the source is placed symmetrically with respect to the slits. The intensity at the central fringe is I0. If one of the slits is closed, the intensity at this point will be
A. I0

B. I0/4

C. I0/2

D. 4 I0

Answer :

We know the maximum amplitude is

Here,



Now, if one slit is closed,


Hence,

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