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Consider the diffraction pattern obtained from the sunlight incident on a pinhole of diameter 0.1 µm. if the diameter of the pinhole is slightly increased, it will affect the diffraction pattern

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Width increases, but intensity decreases

Width of fringes decreases, but intensity decreases

Width increases, but intensity increases

Width of fringes decreases, but intensity increases

answer is A.

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Detailed Solution

$β = 1.22 \frac{f λ}{d}$
If d is increased
Its size (β) decreases
And intensity increases as it collects more light and superimposed in smaller region.

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