focal length Meaning in the Cambridge English Dictionary

Meaning of “focal length” in the English Dictionary

"focal length" in British English

See all translations

focal lengthnoun [C usually singular]

uk   us   specialized
the ​distance between a ​point where ​waves of ​lightmeet and the ​centre of a lens
(Definition of focal length from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
Translations of “focal length”
in Chinese (Simplified) 焦距…
in Chinese (Traditional) 焦距…
What is the pronunciation of focal length?
Add Cambridge dictionaries to your browser to your website
Word of the Day


showing no fear of dangerous or difficult things

Word of the Day

Calling occupants of interplanetary craft
Calling occupants of interplanetary craft
by Colin McIntosh,
December 01, 2015
Are you a fan of shows like Doctor Who and Star Trek? Both shows have been around since the 1960s, and, not surprisingly, have generated some of their own vocabulary, some of which has now entered the Cambridge English Dictionary. The phenomenon of fandom, meaning “the state of being a fan of

Read More 

conversational user interface noun
conversational user interface noun
November 30, 2015
a computer interface that provides information to users in normal, conversational speech in response to spoken requests Nearly every major tech company—from Amazon to Intel to Microsoft to Google—is chasing the sort of conversational user interface that Kaplan and his colleagues at PARC imagined decades ago.

Read More