luminosity
英 [luːmɪ'nɒsətɪ]
美 [,lʊmə'nɑsəti]
英語の語源
- luminosity (n.)
- 1630s, "quality of being luminous," from French luminosité or else a native formation from luminous + -ity. In astronomy, "intrinsic brightness of a heavenly body" (as distinguished from apparent magnitude, which diminishes with distance), attested from 1906.
例文
- 1. For a few years its luminosity flared up to about 10000 times the present-day luminosity of the Sun.
- その明るさは数年に一度、現在の太陽の明るさの1万倍ほどに達した。
- 2.Mount Battie without losing its definition would take on a blue luminosity .
- 遠くのバティ山は青々とした夕暮れに浸っていて、輪郭がぼんやりしている。
- 3.Astronomers tacitly assume that stars of the same luminosity and color all have the same mass.
- 天文学者は、光度も色も同じ恒星が同じ質量を持つことを暗黙のうちに黙認した。
- 4.The cloud should then have an infrared luminosity thousands of times the sun 's bolometric luminosity .
- 雲の赤外光度は太陽熱光度の数千倍でなければならない。
- 5.The quasars cannot shine for longer than a few million years with their present luminosity .
- 数百万年後には、今日のような発光度を持つことはできません。
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