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What is the magnification produced by a concave lens of foacl length 10 cm , when an image is formed at a distance of 5 cm from the lens?

Options

  1. A2.0
  2. B1.0
  3. C0.5
  4. D0.33

Correct answer

C. 0.5

Step-by-step solution

By lens formula aligned & 1 ~V - 1 u = 1 f & 1 -5 - 1 u = 1 -10 [ concave lens always form image aligned on same side as that of object. so v is -ve ] aligned & 1 u - 1 10 = 1 5 & 1 u = 1-2 10 & 1 u = 1 10 & u =-10 aligned So, m= v u = -5 -10 = 1 2 =0.5

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