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A slit of width a is illuminated by red ...

A slit of width a is illuminated by red light of wavelength 650 nm. The first diffraction minimum is observed at an angle `theta_(1) = 5.2^(@)` from the direction of the incident beam.
The width of the slit a in mm is

A

`5.12xx10^(-3)`

B

`7.17xx10^(-3)`

C

`3.21 xx 10^(-7)`

D

`4.25 xx 10^(-7)`

Text Solution

Verified by Experts

The correct Answer is:
B
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