Spectrum of Thermal Radiation

Spectrum of Thermal Radiation

. When the intensity of thermal radiation is spread out as a function of wavelength, the resultant spectrum is most intense in a band of wavelengths that depends on the temperature. This occurs at visible wavelengths when the temperature is about 6,000 degrees Kelvin. Such a hot gas emits radiation at longer wavelengths, but at a lower intensity. In contrast, non-thermal radiation is more intense at longer radio wavelengths. High-speed electrons emit non-thermal radiation in the presence of a magnetic field.

Copyright 2010, Professor Kenneth R. Lang, Tufts University