CBSE Class 10 Answered
derive the lens formula.
Asked by haritsourabhharit | 07 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.
Regards
Team
Topperlearning
Answered by | 08 Oct, 2010, 06:20: AM
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