| 单词 | point of refraction |
| 释义 | > as lemmaspoint of refraction point of refraction n. [after post-classical Latin punctum refractionis (a1672 in Newton); compare French point de réfraction (1691)] Optics a point at which refraction of a ray takes place. ΚΠ 1728 tr. I. Newton Optical Lect. 173 The Refraction of a Ray by a Curve is the same, as by a Plane touching the Curve in the Point of Refraction [L. in puncto refractionis]. 1886 Jrnl. Anthropol. Inst. 15 124 In every variety of ametropia the cardinal points of refraction are disturbed. 1993 Daily Mail (Nexis) 26 Oct. 34 Short sight is caused by a lengthening of the eyeball, resulting in a point of refraction in front of the retina. < as lemmas |
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