Word · Frequency #25798
luminosity
发光度；光明；光辉
the quality of being luminous; emitting or reflecting light
- 1.
the state of being luminous, or a luminous object; brilliance or radiance
发光的性质或发光体；光辉或灿烂。
- 2.
the quality of being luminous; emitting or reflecting light
发光的特性；发出或反射光
- 3.
the ratio of luminous flux to radiant flux at the same wavelength; the luminosity factor
同一波长下光通量与辐射通量之比；即亮度因子。
- 4.
The rate at which a star radiates energy in all directions.
恒星向四周辐射能量的速率。
光度；亮度；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。
In use
The luminosity of the star was measured by astronomers.
This lamp has adjustable luminosity for different moods.
The painting's luminosity comes from the artist's use of light colors.
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。
measure luminosity
Astronomers measure the luminosity of galaxies.
天文学家测量星系的光度。
high/low luminosity
Connections
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
- 光度级
- The star was classified as a supergiant by its luminosity class.这颗恒星依据其光度级被归类为超巨星。
Learner notes
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。
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。
Grammar Note
通常不可数，可数时表示不同类型或实例
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.
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.