Question on: WAEC Physics - 1998
A converging lens of focal length 5cm is used as a magnifying glass by a man whose nearpoint is 35cm. Calculate the magnification given by the lens
A
8
B
7
C
6
D
5
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Correct Option: C
(\frac{1}{f} = \frac{1}{u} + \frac{1}{v})
= (\frac{1}{5} - \frac{1}{35} = \frac{30}{175})
U = (\frac{175}{30}) = 5.8m
(\frac{v}{u} = \frac{35}{5.8})
= 6
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