| 单词 | photometric system |
| 释义 | > as lemmasphotometric system photometric system n. Astronomy a system for inferring some of the physical parameters of a star from photometric measurements made at certain definite wavelengths. ΚΠ 1903 Science 6 Nov. 596.2 In order to arrange all the brightnesses in magnitude, values were taken for the first three, which accorded with the photometric system of Harvard Observatory. 1987 G. Walker Astron. Observ. i. 13 In most widely used broad band photometric systems the magnitude of Vega is zero at all wavelengths at which it has been detected. < as lemmas |
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