Fig9_9 Nonthermal

Fig9_9 Nonthermal

Fig. 9.9 . 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 peak occurs at visible wavelengths when the temperature is about 6,000 K. 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 synchrotron radiation in the presence of a magnetic field (see Fig. 9.10).

Copyright 2010, Professor Kenneth R. Lang, Tufts University