http://www.comptons.com/encyclopedia/ARTICLES/0100/01085440_A.html

/28160/english/index.html

http://pittsford.monroe.edu/jefferson/calfieri/physics/Light.html

http://www.learner.org/teacherslab/science/light/

http://www.mhschool.com/student/science/mhscience/5/review/summary/5-3-6-6.html

http://www.yahooligans.com/

Awesome Sound Links

http://tqjunior.thinkquest.org/5116/

http://www.sci.mus.mn.us/sound/nocss/top.html

/19537/Main.html

/C004707/main.php3?Java=Yes

/C008537/first.html