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Question

A spherical mirror and a thin spherical lens have each a focal length of $$-15$$ cm. The mirror and lens are likely to be :


A
both concave
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B
both Convex
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C
the mirror is concave and lens is convex
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D
the mirror is convex but lens is concave
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Solution

The correct option is A both concave
Negative focal length is a characteristic of concave mirror and concave lens. Hence, both mirror and the lens are concave.

Science
NCERT
Standard X

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