Two coherent narrow slits emitting light of wavelength 
in the same phase are placed parallel to each other at a small separation of 
. The light is collected on a screen 
which is placed at a distance 
from the slits. The smallest distance 
such that the 
is a maxima.
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Let 
Draw a perpendicular from 
on 
. For smallest 
, 
is first maxima. So, 
So, 
In 
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