See varying E and B fields
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Categories
Category: Electromagnetic waves
See photons heating ground/air
http://mw.concord.org/nextgen/#interactives/physics/light-sound-physics/sunlight-infrared-physics
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Electromagnetic waves
http://physics.bu.edu/~duffy/HTML5/threeD_EMwave.html
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Categories
Electromagnetic waves
Visualising B/E fields in wave
http://www.walter-fendt.de/html5/phen/electromagneticwave_en.htm
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Helen rates this resource as Good
Explore EM waves
http://www.physicsclassroom.com/Physics-Interactives/Light-and-Color/Electromagnetic-Spectrum
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