Definition of refract in English:

refract

Line breaks: re|fract
Pronunciation: /rɪˈfrakt
 
/

verb

[with object]
  • 1(Of water, air, or glass) make (a ray of light) change direction when it enters at an angle: the rays of light are refracted by the material of the lens
    More example sentences
    • A light ray is refracted when it passes from one medium to another at an angle and its speed changes.
    • The hotter, denser air refracts the light coming from the horizon and the viewer sees an image of the sky near the horizon.
    • When the temperature difference is large enough, the warmer air refracts the light and amazing images can be seen.
  • 1.1Measure the focusing characteristics of (an eye) or of the eyes of (someone): when refracting patients an ophthalmologist relies on verbal reports

Origin

early 17th century: from Latin refract- 'broken up', from the verb refringere, from re- 'back' + frangere 'to break'.

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