The angular frequency formula is correct. --AxelBoldt
--- Reorganized concentrating on simpler topics first. Come on... don't formula look better in another font:
Hmm. Sorry, didn't check this page before, I just changed it back. With my browser/settings, formulae look much better like this:
v = ω / k = λf .
But that's just for me. Feel free to change it back. -- DrBob
Examples of waves Sea-waves, which are perturbations that propagate through water (see also surfing and tsunami). Sound - a mechanical wave that propagates through air, liquid or solids, and is of a frequency detected by the auditory system. Similar are seismic waves in earthquakes, of which there are the S, P and L kinds. Light, radio waves, x-rays, etc. make up electromagnetic radiation. Propagating here is
'a disturbance of the electromagnetic field. '
does it want to mean that before "pass a light wave" there is a quiet magnetic field?
Perfect, but now i think there is another little incongruence. The first paragraph say about waves: "Waves have a medium through which they travel and can transfer energy from one place to another without any of the particles of the medium being displaced permanently". Is not correct to say that for all the kind of waves and to say a few lines later that electromanetic waves don't need a medium...
PS: I would correct it myself but my englis is very bad. (Sorry by the lot of mistakes that is sure I have wroten in this short comment).
It's confusing that "x" is used in the picture to refer to the amplitude. There is an equation down below where "y" is used. --dave