| 单词 | luminosity |
| 释义 | luminosity 1\nLuminous intensity in a particular direction; the apparent brightness of an image. 2 The brightness of a star defined as the total energy radiated in unit time. It is related to the surface area (A) and the effective temperature ( Te ; the temperature of a black body having the same radius as the star and radiating the same amount of energy per unit area in one second) by a form of Stefan's law, i.e. L = AσTe4 where σ is the Stefan constant and L is the luminosity. |
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