A parallel beam of monochromatic light of wavelength 450 nm passes through a long slit of width 0.2 mm. Find the angular divergence in which most of the light is diffracted.
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Most of the light is diffracted between the first order minima on either side of central maximum, for which
As 
is small, therefore, 
Angular divergence 
.
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