Question

what is lens formula . explain the terms invloved in it

Answer 1

DERIVATION OF LENS FORMULA:

LET F BE THE PRINCIPLE FOCUS AND f BE THE LOCAL LENGTH .AN OBJECT AB IS HELD PERPENDICULAR TO THE PRINCIPLE AXIS AT A DISTANCE BEYOND THE LOCAL LENGTH OF LENS

The above equation is known as the lens formula.......

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Answer 2

A lens formula may bedefined as the formulawhich gives the relationship between the distance of image (v), distance of object (u), and the focal length (f) of the lens. It may be written as: Where, v = Distance of image from optical centre of lens. u = Distance of object from optical centre of lens.