This starts a new series of posts that will hopefully inspire discussion among folks taking, teaching, and/or using quantum mechanics. If you're reading this on Google+, the equations are referenced in the album attached to the post.
Did you know that DeBroglie came up with the concept of matter waves considering relativistic invariance? I didn't until quantum I lecture yesterday. Does anyone know how the reasoning went? I can see a way to make sense of it. If you look at energy being equal to, (eq. 1)