18. A screen is at a distance of 2 m from narrow
slit and is illuminated with light of 6000 A.
The first maximum lies at 0.005 m on
either side of the central maximum Then
the distance between the slits will be
a) 0.024mm
b) 0.24mm
c) 2.4mm
d) 24 mm
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Answer:
I think A answer is right
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