# A converging lens of focal length 5cm is used as a magnifying glass by...

Question 609
A
8
B
7
C
6
D
5
E
4
##### Explanation
$$\frac{1}{f} = \frac{1}{u} + \frac{1}{v}$$

= $$\frac{1}{5} - \frac{1}{35} = \frac{30}{175}$$

U = $$\frac{175}{30}$$ = 5.8m

$$\frac{v}{u} = \frac{35}{5.8}$$

= 6

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