CUET · PHYSICS · PYQ PAPER 2025
A point source S is placed at a distance of 12 cm from a converging lens of focal length 10 cm on its principal axis. Where should a diverging mirror of focal length 14 cm be placed from the lens so that a real image is formed on the source itself?
- A 32 cm
- B 28 cm
- C 60 cm
- D 46 cm
Answer & Solution
Correct Answer
(A) 32 cm
Step-by-step Solution
Detailed explanation
Image distance for the lens: \(\frac{1}{v} - \frac{1}{u} = \frac{1}{f}\) \(\frac{1}{v} - \frac{1}{-12} = \frac{1}{10}\) \(\frac{1}{v} = \frac{1}{10} - \frac{1}{12} = \frac{6-5}{60} = \frac{1}{60}\) \(v = +60 \text{ cm}\) For the final image to form on the source, the rays must…
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