An object is placed at a distance of 15 cm in front of a concave mirror with a radius of curvature of 20 cm. Which one among the following statements is <strong>CORRECT</strong> for the image formed?
- A. The image is 30 cm from the mirror on the same side as the object. ✓
- B. The image is formed at a distance of 30 cm behind the mirror.
- C. The image is 60 cm from the mirror on the same side as the object.
- D. The image is formed at a distance of 60 cm behind the mirror.
Correct Answer: A. The image is 30 cm from the mirror on the same side as the object.
Explanation
For a concave mirror, focal length f = -10 \text{ cm} (since R = -20 \text{ cm}) and object distance u = -15 \text{ cm}. Using the mirror formula \frac{1}{v} + \frac{1}{u} = \frac{1}{f}, we find v = -30 \text{ cm}. The negative sign indicates it is formed on the same side as the object.
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