(a) what is meant by power of a lens (b) state and define the SI unit of power of a lens (c) a convex lens of focal length 25 cm and a concave lens of focal length 10 cm are placed in close contact with each other . calcate the lens power of this combinatio
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SI UNIT OF POWER OF LENS IS DIOPTERE
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a) the ability of a lens to diminish or enlarge an image is called the power of that lens.
b) SI unit of power of a lens is Diopter.
c) total power will be 25/100-10/100
i.e. 15/100 or 6.66D
b) SI unit of power of a lens is Diopter.
c) total power will be 25/100-10/100
i.e. 15/100 or 6.66D
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