Q132 / 150 · MHT CET 2020 (12 Oct Shift 1) · Physics

A parallel beam of monochromatic light falls normally on a single narrow slit. The angular width of the central maximum in the resulting diffraction pattern

Correct answer
A
decreases with increase of slitwidth.
B
increases with increase of slitwidth.
C
decreases with decrease of slitwidth.
D
may increase or decrease.

Solution

$X=\frac{2 \lambda D}{a}, X$ will decrease if a increases

Hence, the correct answer is option: 'A'.

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