| 单词 | primary rainbow |
| 释义 | > as lemmasprimary rainbow primary rainbow n. the rainbow produced when light is dispersed within each raindrop by refraction with a single internal reflection, having colours ranging from red on the outside to violet on the inside, and which is the inner and usually brighter rainbow when two are seen (secondary bow or rainbow at secondary adj. 3g). ΘΚΠ the world > the earth > weather and the atmosphere > weather > rainbow > [noun] > primary primary rainbow1665 primary bow1672 1665 R. Hooke Micrographia 48 The order of the Colours..was quite contrary to the primary or innermost Rainbow. 1793 Philos. Trans. (Royal Soc.) 83 1 In this shower two primary rainbows appeared. 1831 D. Brewster Treat. Optics xxxii. 265 The primary or inner rainbow, which is commonly seen alone, is part of a circle whose radius is 41°. 1992 Philos. Trans. (Royal Soc.) A. 338 397 New features of the primary rainbow have been revealed in recent experiments. < as lemmas |
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