The inside portion of part of a hollow metal sp... - JAMB Physics 1999 Question
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 Option: A
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