Word · Frequency #25798
luminosity
发光性；光辉；明亮
核心释义
the quality or state of being luminous; brightness or radiance
- 1.
发光的性质或发光体；光辉或灿烂。
the state of being luminous, or a luminous object; brilliance or radiance
- 2.
发光的特性；发出或反射光
the quality of being luminous; emitting or reflecting light
- 3.
同一波长下光通量与辐射通量之比；即亮度因子。
the ratio of luminous flux to radiant flux at the same wavelength; the luminosity factor
- 4.
恒星向四周辐射能量的速率。
The rate at which a star radiates energy in all directions.
光度；亮度因子；发光的性质或发光体；光辉或灿烂。；发光的特性；发出或反射光；同一波长下光通量与辐射通量之比；即亮度因子。
用法In use
The luminosity of the full moon made it easy to walk along the beach at night.
用法提示：luminosity 是名词，这里用“the luminosity of...”结构表示某物发光的明亮程度。
Thick clouds blocked the sun's luminosity, and the whole valley turned grey.
用法提示：luminosity 作名词，指太阳发出的光辉，在句中作 blocked 的宾语。
Photographers love the soft luminosity of the early morning light.
用法提示：luminosity 前有形容词 soft 修饰，作名词表示光线的明亮质感。
its luminosity is measured relative to that of our sun
luminosity of sth
The luminosity of the star is immense.
这颗恒星的光度极大。
相关词与表达Connections
搭配Collocations
- high luminosity
- 高亮度；高光度
- The high luminosity of the LED makes it suitable for outdoor displays.这种LED的高亮度使其适用于户外显示屏。
- low luminosity
- 低光度；低亮度
- Astronomers use special instruments to detect stars with very low luminosity.天文学家使用特殊仪器探测光度非常低的恒星。
- solar luminosity
- 太阳光度
- The solar luminosity is the total energy the Sun radiates per second.太阳光度是太阳每秒辐射的总能量。
- stellar luminosity
- 恒星光度
- Stellar luminosity depends mainly on the star's mass and temperature.恒星光度主要取决于恒星的质量和温度。
- luminosity class
学习提示Learner notes
记忆技巧Memory Tip
把开头的lumin想成光的单位“流明”（lumen），流明越多越亮，luminosity就是发光度、光度。
语境与语域Context & Register
语域：formal 常见场景：天文学、物理学、书面描写 luminosity 属于较正式的用词，多用于科技（尤其天文学、物理学）或书面描写中；在日常口语中较少出现，普通对话更常用 brightness 等词。
语法说明Grammar Note
多用于物理学、天文学等学术语境，日常会话中较少出现。
发音与拼写Pronunciation & Spelling
The -osity words above rhyme with one another in BrE (final /ɒsəti/), but they do not exactly rhyme with luminosity, whose ending is given as /nɒsɪti/. Beware lookalikes such as luminous /ˈluːmɪnəs/, which has a different vowel and stress.
一起学习词形Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.