Saved Bookmarks
| 1. |
State any four characteristics of blackbody radiation spectra. |
|
Answer» Solution :CHARACTERISTICS of blackbody RADIATION spectra: (1) The EMISSIVE power of a blackbody `E_lamda,`for every wavelength`lamda,`increases with increasing temperature. (2) Each curve has a characteristic form with a maximum for `E_lamda` at a certain wavelength `lamda_m` (3) `lamda_m` depends onlyon the absolute temperature of the blackbody and, with increasing temperature, shifts towards SHORTER wavelength (i.e. towards the ultraviolet end of the spectrum). (4) `lamda_mT` = a constant. (5) The area under each curve gives the total radiant power per unit area of a blackbody at that temperature and is proportional to `T^(4)` (Stefan's law). |
|