how to calculate the power of lens.
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The diopter is the unit of measure for the refractive power of a lens. The power of a lens is defined as the reciprocal of its focal length in meters, or D = 1/f, where D is the power in diopters and f is the focal length in meters. Lens surface power can be found with the index of refraction and radius of curvature.
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You can use the formula for finding the power of lens ,
Power of lens =1/focal length
SI unit of power is dioptre
For example,if the focal length is 2 means the power of lens will be
Power of lens =1/3=0.5D
Power of lens =1/focal length
SI unit of power is dioptre
For example,if the focal length is 2 means the power of lens will be
Power of lens =1/3=0.5D
If you want to solve if the image and object distance are given ,use the mirror formula first and then use power formula
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