An object is placed 15 cm from a convex lens of focal length 10 cm. The image is formed at
A. 6 cm on the other side of the lens
B. 30 cm on the other side of the lens
C. 30 cm on the same side as the object
D. 25 cm on the other side of the lens
1 answer
Best answer
Answer: B. 30 cm on the other side of the lens
\(\frac{1}{v} - \frac{1}{u} = \frac{1}{f} \Rightarrow \frac{1}{v} = \frac{1}{10} + \frac{1}{-15} = \frac{1}{30}\), so \(v = +30\) cm (real image on the other side).
Doubtly AI
· 24 Oct 2026
AI-verified · Oct 2026
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