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Infrared radiation is used in industrial, scientific, and medical applications

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According to the Environmental Protection Agency, incandescent bulbs convert only about 10 percent of their electrical energy input into visible light energy

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IR radiation is one of the three ways heat is transferred from one place to another

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Infrared light is the part of the EM spectrum that people get most in everyday life, although much of it goes unnoticed. It is invisible to human eyes, but people can feel it as heat.

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Infrared radiation is a type of electromagnetic radiation

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Infrared light:
A type of light that is invisible to us.

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Far infrared waves are thermal

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Infrared (IR) is an invisible radiant energy, electromagnetic radiation with longer wavelengths than those of visible light, extending from the nominal red edge of the visible spectrum at 700 nanometers (frequency 430 THz) to 1000000 nm (300 GHz) (although people can see infrared up to at least 1050 nm in experiments).

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Infrared (IR) is an invisible radiant energy, electromagnetic radiation with longer wavelengths than those of visible light, extending from the nominal red edge of the visible spectrum at 700 nanometers (frequency 430 THz) to 1000000 nm (300 GHz) (although people can see infrared up to at least 1050 nm in experiments).

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lies between visible and microwave portions.

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Infrared:
A wavelength just greater than that of the red end of the visible light spectrum but less than that of microwaves.