A candle flame 1 cm high is imaged in a ball bearing of diameter 0.4 cmn. If the ball bearing is 20 cm
away from the flame, find the location and the height of the image.
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Explanation:
Solution
Height of the object AB=1.6 cm
diameter of the ball bearing =d=0.4cm
→R=0.2cm
Given u=20cm
Weknow1v+1u=2R
Putting the values according to sign conventions
1−20+1v=22.0
→v=1 cminside the ball bearing.
Magnification =m
=A'B'ABvu
=AB200=1200
→A'B'=AB200+1.6200
=+0.008cm
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