| 单词 | luminosity curve |
| 释义 | > as lemmasluminosity curve luminosity curve n. a graph showing how emitted energy, or perceived brightness, varies with wavelength. ΘΚΠ the world > relative properties > number > graph or diagram > [noun] > graph > showing specific relationship characteristic1881 characteristic curve1881 time curve1883 luminosity curve1886 hysteresis curve1890 hysteresis loop1892 time-distance1892 solidus1901 power curve1908 log log1910 Russell diagram1922 creep curve1931 power curve1932 Hertzsprung–Russell diagram1939 Petersen graph1947 utility curve1948 tournament graph1959 offset1987 1886 Abney & Festing in Philos. Trans. (Royal Soc.) 177 425 By successive alterations in the distance of the comparison-light other pairs of points in the spectrum are determined until the limits of the visible spectrum are reached. The curves of intensities of different parts of the spectrum plotted from these observations will be found to be fairly smooth. This curve we call the ‘luminosity curve’. 1886 Abney & Festing in Philos. Trans. (Royal Soc.) 177 452 We..determined the luminosity-curve of a candle. 1900 Astrophysical Jrnl. 11 220 (heading) Determining the luminosity curve of the solar spectrum. 1937 Nature 6 Mar. 409/2 The maximum of this luminosity curve was at 510 mμ. This was a mean value for forty-eight young observers. 1941 J. D. Cobine Gaseous Conductors xiii. 514 The luminosity curve for an incandescent lamp is shifted slightly toward the long wave lengths compared with sunlight. 1951 Proc. IRE 39 1143/2 The luminosity curve expresses the relation..between the luminance and the radiance of spectrum colors. 1951 Proc. IRE 39 1144/1 Based on the new definition of the lumen, and on the new International Temperature Scale, the peak value of the luminosity curve corresponds to 680 lumens per watt. < as lemmas |
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