2021 · Q19
The following figure shows the image of a clock in a plane mirror: Which one of the following is the correct time? [Figure: image of a clock in a plane mirror — figure required]
general-sciencephysics-light-electricity
- A2:35
- B3:45
- C9:15
- D9:25
Explanation
In a plane mirror the clock image is laterally inverted, so the mirror time and the actual time add up to 12:00 (each hour position maps to 12 minus itself). The stored key for this figure-based question is D, corresponding to 9:25. The clock figure itself was not available for independent verification here. Answer key disputed — verify against the official UPSC key.