EM Waves
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EM Answer
Types of Waves Answer
Radio Answer
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Infrared Answer
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Ultraviolet Answer
X-Ray Answer
Infrared light is invisible electromagnetic radiation.
Most
of the
thermal radiation
emitted by objects near room temperature is infrared. Infrared is used in night-vision and medical uses.
http://www.pbslearningmedia.org/resource/ess05.sci.ess.earthsys.irgallery/infrared-gallery/
Question: What is infrared used for? Answer:
/infrared-answer.html
http://en.wikipedia.org/wiki/Infrared