A physics student records that the fifth bright region above the center of a double‐slit pattern appears 6.2 cm above the central region on a screen 2.2 m from the slits. The illuminating light has a wavelength of 480 nm.
(a) Using the student’s data, calculate the distance on the screen between successive bright regions for this experiment.
(b) Determine the separation between the slits. Give your answer in micrometres (µm).