This resource includes the following topics: microwaves (mw), interference: the difference between waves and bullets, demonstration: microwave interference, interference - phase shift, microwave interference, prs question: interference, two transmitters, two in-phase sources: geometry, interference for two sources in phase, the light equivalent: two slits, young?s double-slit experiment, prs question: double slit path difference, lecture demonstration: double slit, diffraction, single-slit diffraction, intensity distribution, prs question: two slits with width, babinet?s principle, experiment 13.