The
wavelength
(and speed) change, not frequency when light enters different
media. (other
applet)
Derivation of
Snell's
law
from geometrical considerations (with wavefronts).
Snell's
law
from a point source in many media
The
world
from the point of view of a fish.
Total
internal
reflection for a curved lens.
Excellent older java applets for optics
Non-working(?) links
Law of reflection java applet
(Try level 2 on this) You might like to use the law of refelection to approximately play pool.
Refraction - reflection with wavelets from Huygen's principle (nice).One of my favorites: a light under a swimming pool. (non working)