equivalent focal length

noun

optics the ratio of the size of an image of a small distant object near the optical axis to the angular distance of the object in radians

QUIZZES

DO YOU KNOW THIS VOCABULARY FROM "THE HANDMAID'S TALE"?

"The Handmaid's Tale" was required reading for many of us in school. Everyone else has probably watched the very popular and addictive TV show. Do you remember this vocabulary from the book, and do you know what these terms mean?
Question 1 of 10
decorum
the act of or need for making up one's mind.
dignified propriety of behavior, speech, dress, etc.
a company of singers, especially an organized group employed in church service.
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Words nearby equivalent focal length

equivalence relation, equivalency, equivalent, equivalent air speed, equivalent circuit, equivalent focal length, equivalent weight, equivalve, equivocal, equivocally, equivocate
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012