Answers

2016-03-04T15:07:24+05:30
SI unit is diopters and the definition is the ability of the lens to  converge or diverge
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2016-03-04T15:08:26+05:30
The power of a lens is its ability to bend light – the greater the power the greater the refraction of light. The power of a lens is also related to the focal length by the following formula: P=1/f
Power of a lens is measured in Dioptres (D).
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