If $\mathrm{I}_0$ is the intensity of the principal maximum in the single slit diffraction pattern, then…
If $\mathrm{I}_0$ is the intensity of the principal maximum in the single slit diffraction pattern, then what will be the intensity when the slit width is doubled?
$\frac{\mathrm{I}_0}{2}$
$\mathrm{I}_0$
$4 \mathrm{I}_0$
$2 \mathrm{I}_0$
Solution
The slit width has no effect on the intensity of the principal maximum in the single-slit diffraction pattern.
$\therefore \quad$ The intensity will be same, $\mathrm{I}_0$.