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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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更新时间:2025/6/23 1:17:36