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

by | Aug 26 | Physics WAEC | 0 comments

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

Correct Answer:

Option A – concave mirror of focal length 5cm

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