Meaning Of The Word Focal length

Real Dictionary

What's the definition of Focal length? Find Focal length meanings, definitions and more at the Real Dictionary online.

Focal length Meaning

Focal length Definition
Focal length Definition

What's The Definition Of Focal length?

focal length in American English
the distance from the optical center of a lens or curved mirror to the point where light rays from a very distant object converge
noun: the distance from a focal point of a lens or mirror to the corresponding principal plane

focal length in British English
noun: the distance from the focal point of a lens or mirror to the reflecting surface of the mirror or the centre point of the lens

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