[" First diffraction minimum due to a single slit diffraction is at "theta=30^(@)" for a light of "],[" wavelength "6000 AA" .The width of the slit is "],[[" (a) "1times10^(-6)cm," (b) "1.2times10^(-6)m," (c) "2times10^(-6)cm," (d) "2.4times10^(-6)m]]