The band of electromagnetic radiation that is longer in wavelength than the red of the visible spectrum. Infrared radiation is responsible for the transmission of radiant heat. It may be used in physiotherapy to warm tissues, reduce pain, and improve circulation, but is not as effective as diathermy for deep structures. Special photographic film sensitive to infrared radiation is used in ‘thermography.
The band of electromagnetic radiation which has a longer wavelength than that of the red in the visible spectrum. Infrared radiation is used in the special photographic process essential to thermography. Its property of transmitting radiant heat has made infrared radiation invaluable in physiotherapy, where it warms tissues, soothes pain and increases the local circulation.
Within the vast electromagnetic spectrum, there exists a category of radiation that occupies a space shorter than radio waves but longer than visible light. This particular range encompasses wavelengths spanning from 1 centimeter to 8000 angstroms.