A real image of an object fomed by a converging lens of focal length 15cm is three times the size of the object. What is the distance of the object from the lens?

by | Aug 31 | Physics WAEC | 0 comments

A. 30cm
B. 25cm
C. 20cm
D. 15cm
E. 10cm

Correct Answer:

Option C – 20cm

Explanation

1/u + 1/3u = 1/15; u = 20cm

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