英语词汇“fluorescence”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

noun

1. physics

the emission of light or other radiation from atoms or molecules that are bombarded by particles, such as electrons, or by radiation from a separate source. The bombarding radiation produces excited atoms, molecules, or ions and these emit photons as they fall back to the ground state

such an emission of photons that ceases as soon as the bombarding radiation is discontinued

such an emission of photons for which the average lifetime of the excited atoms and molecules is less than about 10–8 seconds

the radiation emitted as a result of fluorescence

Compare phosphorescence

单词	fluorescence
释义	Word Frequency fluorescence (ˌflʊəˈrɛsəns) noun 1. physics a. the emission of light or other radiation from atoms or molecules that are bombarded by particles, such as electrons, or by radiation from a separate source. The bombarding radiation produces excited atoms, molecules, or ions and these emit photons as they fall back to the ground state b. such an emission of photons that ceases as soon as the bombarding radiation is discontinued c. such an emission of photons for which the average lifetime of the excited atoms and molecules is less than about 10–8 seconds 2. the radiation emitted as a result of fluorescence Compare phosphorescence Word origin C19: fluor + -escence (as in opalescence)
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