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An object is placed 20cm from a concave mirror of focal length 10cm. The linear ...

An object is placed 20cm from a concave mirror of focal length 10cm. The linear magnification of the image produced is?
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  • B \(\frac{1}{2}\)
  • C 1
  • D 2
Correct Answer: Option C
Explanation:
\(\frac{I}{V}\) = \(\frac{1}{f}\) – \(\frac{1}{u}\)
\(\frac{I}{V}\) = \(\frac{1}{10}\) – \(\frac{1}{20}\)
 = \(\frac{1}{20}\) V
 V = 20cm.
 M = \(\frac{V}{U}\)
 = \(\frac{20}{20}\)
 = 1

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