1 inversely as the wavelength
2 directly as the width of the slit
3 directly as the distance between the slit and the screen
4 inversely as the size of the source from which the slit is illuminated
Explanation:
Width of the diffraction band is given by \(\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\beta = \frac{{\lambda D}}{d}\) where, \(D=\) distance between slit and the screen, \(\lambda=\) wavelength of light used and \(d=\) width of slit.
Hence, width of the diffraction band varies directly as the distance between the slit and the screen.