luminosity

Japanese: luminosity
luminosity

…The amount of light emitted from a light source varies depending on the direction, so when talking about luminosity, it is necessary to indicate the direction in which it is being measured. [Ikeda Mitsuo] (2) Luminosity in Astronomy The luminosity of a celestial body is expressed in units of absolute magnitude. For example, the sun has an absolute magnitude (visually) of +4.8. …

*Some of the terminology that mentions "luminosity" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…光源から出ていく光の量は方向によって違ってくるので,光度をいうときにはどちらの方向に対してであるかを示しておかねばならない。【池田 光男】(2)天文学の光度luminosity 天体の光度は絶対等級という単位で表現する。例えば太陽は(実視の)絶対等級が+4.8等である。…

※「luminosity」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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