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If u is the object distance and v the image dis... - JAMB Physics 2004 Question

If u is the object distance and v the image distance, which of the following expressions gives the linear magnification produced by a convex lens of focal length f?
A
u/f - f
B
u/v + f
C
v/f + 1
D
v/f - 1
correct option: d

Magnification, M = v/u = v (1/u)

And for the Lens formula 1/u + 1/v = 1/f

=> 1/u = 1/f - 1/v

∴M = V(1/u)

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

∴M = v/f - 1

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