Q. An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal length of the mirror is
A. – 30 cm
B. 30 cm
C. – 15 cm
D. +15 cm
Answer: – 15 cm
A. – 30 cm
B. 30 cm
C. – 15 cm
D. +15 cm
Answer: – 15 cm
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