Engineering Board Exam Reviewer · Physics · medium
An object is placed 30 cm in front of a converging lens of focal length 10 cm. Where is the image formed?
- 15 cm on the other side of the lens
- 7.5 cm on the other side of the lens
- 20 cm on the same side as the object
- 40 cm on the other side of the lens
Answer
A. 15 cm on the other side of the lens
Solution
1/f = 1/do + 1/di 1/di = 1/10 - 1/30 = 2/30 di = 15 cm (real image).
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