The central bright fringe in a single slit diffraction pattern from light with wavelength 542 nm is 1.8 cm broad on a screen which is 1.05 m from the slit.
(i) Determine how broad is the slit?
(ii) Determine how broad are the first two bright fringes on either side of the central bright fringe? (Describe the breadth of a bright fringe as the linear distance from minimum to minimum.)