Question:
Consider the diffraction pattern obtained from the sunlight incident on a pinhole of diameter $0.1 \mu \mathrm{m}$. If the diameter of the pinhole is slightly increased, it will affect the diffraction pattern such that:
Correct Option: 1
Solution:
(1)
$\operatorname{Sin} \theta=\frac{1.22 \lambda}{D}$
If $D$ is increased, then $\sin \theta$ will decreased
$\therefore$ size of circular fringe will decrease but intensity increases
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