The diffraction pattern from the single slit is viewed on a screen. By employing blue light, the width of the central maximum is 2.5 cm.
(i) Would the central maximum be narrower or wider when red light is used rather?
(ii) When the blue light has wavelength 0.39 µm and the red light has wavelength 0.80 µm, determine the width of the central maximum if red light is employed?