| 释义 |
fluorescence|fluːəˈrɛsəns|
[f. fluor-spar): see quot. 1852.]
The coloured luminosity produced in some transparent bodies by the direct action of light, esp. of the violet and ultra-violet rays; the property, in certain substances, of rendering the ultra-violet rays visible, so as to produce this phenomenon. Also attrib., as fluorescence spectrum, the spectrum of the light emitted by a substance when excited to fluorescence.
1852Prof. Stokes in Phil. Trans. 479 note, I am almost inclined to coin a word and call the appearance fluorescence, from fluor-spar, as the analogous term opalescence is derived from the name of a mineral. 1867Ure's Dict. Arts (ed. 6) III. 405 Pennsylvanian petroleum is dark-coloured, with a peculiar greenish lustre or fluorescence. 1885J. & C. Lassell tr. Schellen's Spectrum Anal. (ed. 2) lxi. 242 The visible part of the spectrum is then removed from sight, and the fluorescence spectrum alone occupies the field. 1962R. E. Dodd Chem. Spectroscopy ii. 80 The fluorescence spectrum appears at a characteristic wavelength and does not shift with the wavelength of the exciting light. |