PROVE LENS FORMULA

Asked by IOUHIU OYYFGY | 26th Nov, 2010, 06:29: PM

Expert Answer:

Lense formula:

Let AB represent an object placed at right angles to the principal axis at a distance greater than the focal length f of the convex lens. The image A1B1 is formed beyond 2F2 and is real and inverted.

OA = Object distance = u

OA1 = Image distance = v

OF2 = Focal length = f

OAB and OA1B1 are similar

But we know that OC = AB

the above equation can be written as

From equation (1) and (2), we get

Dividing equation (3) throughout by uvf

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Answered by  | 27th Nov, 2010, 01:29: AM

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