Mathematics · Optics - Mirror Formula Numerical
An object is placed at a distance of 12 cm in front of a concave mirror. Its real image is formed at a distance of 18 cm on the same side. The focal length of the mirror is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1-36 cm
- 236 cm
- 3-7.2 cm✓
- 47.2 cm
Correct answer
-7.2 cm
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