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A child has near point at 10 cm. What is...

A child has near point at 10 cm. What is the maximum angular magnification the child can have with a convex lens of focal length 10 cm?

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The correct Answer is:
B
The child had D=10 cm and f=10 cm. The maximum angular magnification is obtained when the imasge is formedd at near point.
`=m=1+D/f=1+10/10`
`=1+1=2`
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