The Fraunhoffer 'diffraction' pattern of a single slit is formed in the focal plane of a lens of focal length 
. The width of slit is 
. If third minimum is formed at a distance of 
from central maximum, then wavelength of light will be
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
(since 
is very small so 
)
or 
.
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