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Q.

The ability of a lens to bend the light incident upon it is called the [[1]] of the lens.


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Detailed Solution

The ability of a lens to bend the light incident upon it is called the power of the lens.
The power of the lens can also be defined as the reciprocal of focal length (f) in metres (m). The lens of a shorter focal length will bend the light ray more, thus having larger power.
The power of the lens can be formulated as  P= 1f  where = focal length of the lens.
SI Unit of Power is m-1. It can also be denoted as Dioptre (D).
 
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