A cardsheet divided into squares each of size `1 mm^(2)` is being viewed at a distance of `9 cm` through a magnifying glass (a conerging lens of focal length `10 cm`) held close to the eye. (a) What is the magnification produced by the lenas ? How much is the area of each square to the virtual image ? (b) What is the angular magnification (magnifying power) of the lens ? ( c) Is the magnification in (a) equal to the magnifying power in (b) ? ExplainA. `1cm^2`B. `0.81cm^2`C. `0.27^2`D. `0.60cm^2`

A cardsheet divided into squares each of size `1 mm^(2)` is being view

1.	A cardsheet divided into squares each of size `1 mm^(2)` is being viewed at a distance of `9 cm` through a magnifying glass (a conerging lens of focal length `10 cm`) held close to the eye. (a) What is the magnification produced by the lenas ? How much is the area of each square to the virtual image ? (b) What is the angular magnification (magnifying power) of the lens ? ( c) Is the magnification in (a) equal to the magnifying power in (b) ? ExplainA. `1cm^2`B. `0.81cm^2`C. `0.27^2`D. `0.60cm^2`
Answer» Correct Answer - A `u=-9cm,f=10cm` `(1)/(v)-(1)/(u)=(1)/(f)implies(1)/(v)-(1)/(-9)=(1)/(10)` `(1)/(v)=(1)/(10)-(1)/(9)=(-1)/(90)` `v=-90cm` `m=(v)/(u)=(-90)/(-9)=10` `(A_i)/(A_O)=m^2implies(A_i)/(I)=(10)^2` `A_i=100m^2=1cm^2`

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