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A · B · C · D · E · F · G · H · I · J · K · L · M · N · O · P · Q · R · S · T · U · V · W · X · Y · Z   entire Web this site infrared radiation Electromagnetic radiation whose wavelengths lie in the range from 0.75 micrometer to 1000 micrometers; invisible long wavelength radiation (heat) capable of producing a thermal or photovoltaic effect, though less effective than visible light. Related category    • SOLAR ENERGY AND POWER Also on this site: Encyclopedia of Science Transport Concepts & Designs (partner site) BACK TO TOP