The inside portion of a hollow metal sphere of diameter 20 cm is polished. The portion will therefore form a
a
Concave mirror of focal length 5cm.
b
Concave mirror of focal length 10 cm.
c
Convex mirror of focal length 10 cm
d
Convex mirror of focal length 5cm
Explanation
Correct Option
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Chrisbridge
1 year ago
The correct option is A. When the inside portions of metals are polished, they become reflecting surfaces.
