derive the lens formula.

Asked by haritsourabhharit | 7th Oct, 2010, 11:45: AM

Expert Answer:

Dear student
Dear Student
Following is the detailed derivation of lens 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

We hope that clarifies your query.




Answered by  | 8th Oct, 2010, 06:20: AM

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