Question
What is the power of a lens whose focal length is 1
m?Solution
Focal length: The lens power is the inverse of the focal length in meters. The physical unit for lens power is 1/meter which is called dioptre (D). Given: Focal length = 1 m Power = ? Power = 1/focal length (focal length = 1m) Power = 1D
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            Functional Group             �...
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