释义 |
re·frac·tion \rə̇ˈfrakshən, rēˈf-\ noun (-s) Etymology: Late Latin refraction-, refractio, from Latin refractus (past participle of refringere) + -ion-, -io -ion 1. : the action of refracting or the state of being refracted: as a. : the deflection from a straight path undergone by a light ray or a wave of energy in passing obliquely from one medium (as air) into another (as water, glass) in which its velocity is different b. obsolete : reflection, rebound c. obsolete : a breaking up d. : the change in the apparent position of a celestial body that is due to the bending of the light rays emanating from it as they pass through the earth's atmosphere; also : the correction to be applied to the apparent position of a body because of this bending 2. obsolete : reduction of a bill : rebate 3. a. : the refractive power of the eye b. : the act or technique of determining ocular refraction and identifying abnormalities as a basis for the prescription of corrective lenses 4. : the action of distorting an image by viewing through a medium < looking at the world … observing it without the refraction of moral judgment — Janet Flanner > [refraction 1: a light ray, b reflected ray, c refracted ray] |