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If we observe the single slit Fraunhofer diffraction with wavelength $λ$ and slit width d, the width of the central maxima is 2 $θ$ . On decreasing the slit width for the same

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$θ decreases$

$θ increases or decreases depending on the intensity of light$

$θ remains unchanged$

$θ increases$

answer is A.

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Detailed Solution

$2 θ = \frac{2 λ}{d} (where d = slit width)$

As d decreases, $θ$ increases.

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