Infrared radiation was discovered in 1800 by astronomer Sir William Herschel, who discovered a type of invisible radiation in the spectrum lower in energy than red light, by means of its effect on a thermometer. ... Infrared radiation is used in industrial, scientific, military, commercial, and medical applications.
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Infrared radiation was discovered in 1800 by astronomer Sir William Herschel, who discovered a type of invisible radiation in the spectrum lower in energy than red light, by means of its effect on a thermometer. ... Infrared radiation is used in industrial, scientific, military, commercial, and medical applications.