Question

What is lens formula. Obtain formula

=

111

vu f - for spherical lens.​

Answer 1

Answer:

Derive the lens formula, 1/ f = 1/v – 1/u for a concave lens, using the necessary ray diagram. ... Let's consider a convex lens and O be the optical centre ; F the principal focus with focal length f. Let, AB be the object held perpendicular to the principal axis at a distance beyond the focal length of the lens.

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