Which of the following mirror is used to concentrate light on a given spot?

Concave mirror

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Convex mirror

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Plane mirror

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None of these

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Solution

The correct option is A Concave mirror
A concave mirror is also called a converging mirror. When parallel rays of light fall on a concave mirror, they all converge at a point, called the focus point, after being reflected by the mirror.
So, a concave mirror is used to concentrate light on a given spot.

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