A parallel beam of monochromatic light falls normally on a single narrow slit. The angular width of the…
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
decreases with increase of slitwidth.
increases with increase of slitwidth.
decreases with decrease of slitwidth.
may increase or decrease.
Solution
$X=\frac{2 \lambda D}{a}, X$ will decrease if a increases