Sketch the diffraction patterns that you would observe on a screen 1 m from an aperture illuminated by a he-ne laser (wavelength = 633 nm), for the following cases: a) a single slit, with slit width = 20 microns. b) two slits, slit width = 20 microns, slit spacing = 80 microns. draw these diffraction patterns as a function of position on the screen, with the x-axis in units of meters, and label the position of the first zero due to the "slit width" term.