Waves notes finally!

So I'm not entirely sure how it's taken this long to get this done. This seems above and beyond the usual applications of Hofstadter's Law:

It always takes longer than you expect, even when you take into account Hofstadter's Law.

Nevertheless, the introduction to waves is finally up. It covers what phase is in some detail, and covers polarisation and the difference between longitudinal and transverse waves. I also included, for the more inclined reader, a brief mention of angular frequency and the wave number, as a replacement for frequency and wavelength respectively. And I may have referenced the pi vs tao case (mainly though, because the merits of tao are directly focused around exactly this scenaro, trying to elegantly explain this stuff to students. Math whizzes will take the weird factor of 2 in their stride, and physics experts will just round 2pi to 10 anyway, or drop it completely).

So the next thing to do is to write notes in interference. This will not include much mathematics, because I want to do that seperately (I still haven't decided quite what I want to cover. Much of C3 advanced trig is potentially applicable, as are complex numbers, phasors, and at the deep end fourier series are an interesting option if I can typeset it into Word). Interference will cover the main topics that are tested: standing waves, diffraction, superposition, and the single and double slit experiments. Diffraction gratings are black magic, but I suppose we'll have to cover them eventually.

For now though, here's a drawing from my waves introduction notes: