Movies from 111
- Note how the wave pattern definitely moves to the right.
- However any particular point (look at the blue one) just moves transversely (ie up and down) to the direction of the wave.
- The wave velocity is defined as the wavelength divided by the time it takes a wavelength (green) to pass by a fixed point (blue).
http://wug.physics.uiuc.edu/courses/phys112/fall97/acts/lect22/act22b/sld001.htm