김형준
http://www.geo.mtu.edu/rs/back/spectrum - The Electromagnetic Spectrum
http://galaxy.channeli.net/psychob/ - 신범철의 홈페이지 가상실험실
http://143.248.81.7:7777/html/internet/echide/science/star/3_2_2.htm
http://www.nzine.co.nz/features/neilcherry.html - The Electromagnetic Radiation Health Threat
http://www.elecenergy.inter.net - Electromagnetic Energy Association
http://observe.ivy.nasa.gov/nasa/education/reference/emspec/emspectrum.html
http://www.elecenergy.inter.net - '체험하는 물리'를 click한 후 '전자기파의 전파'를 다시 click할 것