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Light of wavelength 6328Å is incident no...

Light of wavelength `6328Å` is incident normally on slit having a width of `0.2mm`The width of the central maximum measured form minimum to minimum of diffraction pattens on a screen `9.0meter`away will be about-

A

0.36 degree

B

0.18 degree

C

0.72 degree

D

0.09degree

Text Solution

Verified by Experts

Angular width of the central bright is `(2lamda)/d`
=`(2 times 6328 times 10^-10)/(0.2 times 10^-3) times (180^0)/pi= 0.36 degree`
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