The inside portion of part of a hollow metal sphere of diameter 20cm is polished....

Physics

JAMB 1999

The inside portion of part of a hollow metal sphere of diameter 20cm is polished. The portion will therefore form a

A. concave mirror of focal length 5cm
B. concave mirror of focal length 10cm
C. convex mirror of focal length 5cm
D. convex mirror of focal length 20cm

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Correct Answer: Option A

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The inside portion of part of a hollow metal sphere of diameter 20cm is polished....

Correct Answer: Option A

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