refract
re·fract [refract refracts refracted refracting] BrE [rɪˈfrækt] NAmE [rɪˈfrækt] verb ~ sth (physics)
(of water, air, glass, etc.)to make light change direction when it goes through at an angle
•Light is refracted when passed through a prism.
Derived Word: ↑refraction
Verb forms: 
Word Origin:
early 17th cent.: from Latin refract- ‘broken up’, from the verb refringere, from re- ‘back’ + frangere ‘to break’.
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