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An object 4 cm tall is placed in front of a concave mirror. If the magnification produced is -2, find the height of the image.

 

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Using a formula,

 Magnification (m)=h2h1
here h1 object height, h2 image height

Given data in the question: 

  • Object height (h1) = 4 cm
  • Magnification (m) = -2

Putting values in the formula,

2=h24h2=8 cm

The height of the image is 8 cm, and the negative sign indicates that the image is inverted.

Posted by

Saniya Khatri

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