Two spherical mirrors, one convex and other concave are placed on a table with their reflecting surfaces facing upwards. How would you distinguish between them without touching them?

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Solution

Concave mirrors are spherical mirrors, curved inward.
When you keep an object in front of a concave mirror an enlarged image of an object is formed when it is kept close to the mirror and an inverted image is formed when it is kept at a distance from the mirror.
Whereas, convex mirrors are spherical mirrors curved outward. When an object is kept in front of the convex mirror it always forms a small and erect image of the object.

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