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In a single slit diffraction experiment,...

In a single slit diffraction experiment, the width of the slit is made double its original width. Then the central maximum of the diffraction pattern will become

A

broader and brighter

B

sharper and brighter

C

sharper and fainter

D

broader and fainter

Text Solution

Verified by Experts

The correct Answer is:
D
Width of central maximum diffraction pattern due to a single slit`=(2lamdaD)/(a)`
where `lamda` is the wavelength, D is the distance between screen and slit and a is the slit width.
As the slit width a increases, width of central maximum decreases i.e., central maximum becomes sharper or narrower. as same energy is distributed over a smaller area, therefore central maximum becomes brighter.
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