The slits in a Young's double slit experiment have equal widths and the source is placed symmetrically relative to the slits. The intensity at the central fringes is I0. If one of the slits is closed, the intensity at this point will be
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a
Io
b
I0 / 4
c
I0 / 2
d
4I0
answer is B.
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Detailed Solution
If intensity of each wave is I, then initially at central position I0=4I. when one of the slit is covered then intensity at central position will be I only i.e.,I04