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Definition of focal length noun from the Oxford Advanced Learner's Dictionary

focal length

noun
 
/ˌfəʊkl ˈleŋkθ/
 
/ˌfəʊkl ˈleŋkθ/
(physics)
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  1. the distance between the centre of a mirror or a lens and its focus
See focal length in the Oxford Advanced American Dictionary
Check pronunciation: focal length

Nearby words

perspective
noun
 
 
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