Question

Establish the relation 1/u+1/v=1/f for concave mirror forming virtual image

Answer 1

For the virtual image formed in concave mirror
u = negative
v = Positive
f = negative

(1/-u) + (1/+v) = (1/-f)

(1/v) = (1/u) - (1/f)


Hence this the relation between focal length, object distance, image distance for the concave mirror forming virtual image without sign convection

Answer 2

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