Wave Optics

In a single slit diffraction pattern, the distance between the first minimum on the left and the first minimum on the right is \(5 \mathrm{~mm}\). The screen on which the diffraction pattern is obtained is at a distance of \(80 \mathrm{~cm}\) from the slit. The wavelength used is 6000 \(\mathop A\limits^o\). The width of the silt is