单词 | light bucket |
释义 | > as lemmaslight bucket light bucket n. Astronomy (colloquial) a reflecting telescope with a relatively large aperture, regarded as a device for collecting and focusing low-intensity radiation. ΚΠ 1952 Science 29 Feb. 225/2 The telescopes should be reflectors (because of their perfect achromatism) and should be of the ‘light-bucket’ type. 1970 Nature 7 Feb. 492/2 Infrared telescopes, more properly called flux collectors—light buckets in the language of astronomy—are cheap compared with similar equipment for the visible spectrum. 2016 Altoona (Pa.) Mirror 27 Nov. d6/3 You'll need a larger light bucket—4 inches or more in diameter—to see fainter star clusters, nebulae and galaxies. < as lemmas |
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