Question

Both a spherical mirror and a thin spherical lens have a focal length of (+) 20 cm. What type of mirror and lens are these?

Answer 1

Answer:

By convention, the focal length of a convex mirror and a convex lens are taken positive. Hence, both the spherical mirror and the thin spherical lens are convex in nature.........

Explanation:

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Answer 2

Answer:

Both the mirror and the lens is concave

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