(idea) by asqui Sat Sep 16 2000 at 22:54:50

This is the lens equation connecting the distance between lens and oject/image to the focal length of the lens. It may also be used for curved mirrors.

1/u + 1/v = 1/f

ie. The reciprocal of the distance between lens and object, add the reciprocal of the distance between lens and image equals the reciprocal of the focal length.

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