Physics WAEC

A converging lens of focal length 5cm is used as a magnifying glass by a man whose near-point is 35cm. Calculate the magnification given by the lens?

A. 8
B. 7
C. 6
D. 5
E. 4

Correct Answer:

Option C – 6

Explanation

1/f=1/u+1/v

= 1/5−13/5=30/175

U = 175/30 = 5.8m

v/u=35/5.8

= 6

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5 years ago

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