Angular width of central maxima in the Fraunhofer's diffraction pattern is measured, slit is illuminated by the light of wavelength 
. If the slit is illuminated by light of another wavelength angular width decreases by 
, wavelength of light used:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Condition for the minima 
If angle is small, then 
Half angular width 
full angular width 
Also 
or 
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