what do you understand by power of lens ?to write it's s. I unit
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Power of lens is the ability of the lens to converge the rays of light falling on it. It can also be defined as P=1/f where f is the focal length. ... Dioptre is the S I unit of power of lens. One Dioptre is the power of a lens whose focal length is 1 metre
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Power of a lens is defined as the inverse of focal length (in meters) of the lens. It is a measure of the amount of deviation of light ray produced by a lens, more the power, more is the deviation.
It's SI unit is Dioptre (D).
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