what is a power of lens?

Asked by rohit1993 | 18th Apr, 2008, 06:53: PM

Expert Answer:

Power of lens

The most important characteristic of a lens is its principal focal length, or its inverse which is called the lens strength or lens "power". Optometrists usually prescribe corrective lenses in terms of the lens power in diopters. The lens power is the inverse of the focal length in meters: the physical unit for lens power is 1/meter which is called diopter.


toppers expert

Answered by  | 20th Apr, 2008, 01:29: PM

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