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Concave lens   /kɑnkˈeɪv lɛnz/   Listen
Concave lens

noun
1.
A lens such that a parallel beam of light passing through it is caused to diverge or spread out.  Synonym: diverging lens.






WordNet 3.0 © 2010 Princeton University








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"Concave lens" Quotes from Famous Books



... "long sight," or hyperopia), we put a plus or bulging glass before the eye and thus correct its shape. But if the eye is too round and bulging, producing the familiar "short sight," or myopia, we put a minus or concave lens before the eye, and thus bring it back to the normal. By a curious paradox, however, it often happens that the headache due to eye-strain is caused not by the grosser defects, such as interfere ...
— Preventable Diseases • Woods Hutchinson



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