Answer:
the width of the central bright fringe reduces
Step-by-step explanation:
In a single-slit diffraction experiment, if the width of the slit through which light passes is increased, then the width of the central bright fringe reduces.
Example, if the width of the slit is doubled, then the width of the central bright fringe will be halved.
Thus, for single-slit diffraction experiment, increase in the width of the slit through which light passes will result in a corresponding decrease in the width of the central bright fringe.