CBSE Class 10 Answered
what is a power of lens?
Asked by rohit1993 | 18 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.
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Answered by | 20 Apr, 2008, 01:29: PM
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