A narrow slit illuminated by light produces

A long narrow slit is illuminated by blue light and the diffraction pattern is obtained on a white screen:-How the width of bands change as the distance from the centre increases?

A long narrow slit is illuminated by blue light and the diffraction pattern is obtained on a white screen:-What do you mean by limit of resolution of an optical instrument?

A narrow slit is illuminated by a parallel beam of monochromatic light of wavelength lambda_(0) equals to 6000 A^(0) and the angular width of the central maxima in the resulting diffraction pattern is measured.When the slit is next illuminated by light of wavelength lambda ,the angular width decreases to half.Calculate the value of the wavelength lambda .

A screen is at a distance of 2m that are narrow slit illuminated with light of 6000 A^(@) . The first maximum lies at 0.005mm on either side of the central maximum, then the distance between the slits will be