What is meant by power of lens ? Define it's SI unit.
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Power of lens is the ability of the lens to converge the rays of light falling on it. Definition: The power of a lens is the reciprocal of its focal length in meters. When, f = 1 m, P = 1/f = 1/1 = 1 dioptre. 1 dioptre is the power of a lenswhose focal length is 1 meter.
hdarpan30:
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hey mate here yur answer
P=1/f(in metre)
It's SI unit is dioptre (D)
P=1/f(in metre)
It's SI unit is dioptre (D)
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