In the experiment of diffraction due to a single slit, if the slit width is decreased, the width of the…
In the experiment of diffraction due to a single slit, if the slit width is decreased, the width of the central maximum
becomes zero.
does not change.
increases.
decreases.
Solution
Width of the central maxima $=\mathrm{W}=\frac{\lambda \theta}{\mathrm{d}}$
Thus, the slit width is inversely proportional to the width-of the central maximum.
Hence, when the slit width is decreased, the width of the central maxima increases.