Recent content by EinsteinKid

cepheid sorry about that, I was reading the rules, I knew right away I messed up. THanks for the heads up

Hello everyone, I am new here to the physics forums. So for my first post I need some help on this problem from my homework. Here we go: A laser beam of wavelength 632.8 nm shines at normal incidence upon the reflective side of a compact disc. The tracks of tiny pits in which information...