fluorescence
fluorescence — 名詞
1. a bright, visible glow given off by certain materials when they take in energy f
螢光
物質吸收輻射後發出的可見光
a bright, visible glow given off by certain materials when they take in energy from a shorter-wavelength light source, such as ultraviolet radiation — the glow stops almost as soon as the source is removed
Cyrus was amazed by the bright green fluorescence of the mineral under ultraviolet light.
Cyrus 對這種礦物在紫外光下發出亮綠色螢光感到驚奇。
visible light + UV source collocation
Beatrix watched the jellyfish's fluorescence glow a vivid blue in the dark seawater.
Beatrix 看著水母的螢光在漆黑海水中發出鮮豔的藍色。
marine organism producing fluorescence
Under a UV lamp, Élise observed the orange fluorescence coming from her rock sample.
Élise 在紫外燈下觀察到她的岩石樣本發出橙色螢光。
A faint red fluorescence appeared on the ticket when Lan held it under the black light.
Lan 把票券拿到黑光燈下一照，票券上浮現出淡淡的紅色螢光。
The fluorescence from some corals comes from tiny algae living inside their bodies.
某些珊瑚的螢光來自棲息在牠們體內的小型藻類。
- luminescence
broader term covering any cold-light emission not caused by heat; fluorescence is one type of luminescence
- phosphorescence
similar but delayed emission that continues after excitation stops, unlike fluorescence which is immediate and brief
- bioluminescence
light produced by living organisms through a chemical reaction, not by absorbing external light
文法句型
fluorescence + of + noun phrase
noun + fluorescence
用法筆記
Uncountable; used mainly in scientific or technical contexts. The effect ceases within nanoseconds of removing the energy source — this distinguishes fluorescence from phosphorescence, which continues to glow.
常見錯誤
2. the physical property of a substance that causes it to absorb short-wavelength r
螢光性
物質吸收短波光並發出長波光的特性
the physical property of a substance that causes it to absorb short-wavelength radiation and immediately release it as longer-wavelength visible light
Joshua tested the fluorescence of several diamonds by shining a UV torch on them.
Joshua 用紫外線手電筒測試了幾顆鑽石的螢光性。
diamond fluorescence under UV test
The strong fluorescence of this plastic makes it useful for safety signs in dark buildings.
這種塑膠的強螢光性使其很適合用於黑暗建築物中的安全標示。
practical application in safety materials
Scientists at the lab use fluorescence measurements to identify different chemical compounds.
實驗室的科學家利用螢光性測量來鑑別不同的化學化合物。
Kemi chose a highlighter pen with strong fluorescence to make the text stand out.
Kemi 挑了一支螢光性很強的螢光筆，好讓文字在紙上更顯眼。
- luminescence
broader property of emitting light without heat; fluorescence is a specific subtype with immediate emission
- phosphorescence
similar light-emitting property but with a delayed, longer-lasting glow after the source is removed
文法句型
fluorescence + of + noun
noun + shows / exhibits + fluorescence
用法筆記
Uncountable; describes a material characteristic rather than the light itself. Frequently appears in materials science and analytical chemistry contexts: 'the fluorescence of [substance]'.