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  • A spherical mirror and a spherical lens each have a focal length of -10 cm. The mirror and the lens are likely to be (a) both concave (b) both convex (c) the mirror is concave and the lens is convex (d) the mirror is convex and the lens is concave​

A spherical mirror and a spherical lens each have a focal length of -10 cm. The mirror and the lens are likely to be (a) both concave (b) both convex (c) the mirror is concave and the lens is convex (d) the mirror is convex and the lens is concave​

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From the sign convention, it is known that the focal length is negative in the case of concave mirror and concave lens. So, both the mirror and the thin spherical lens are concave.

Posted by

shubham.krishnan

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