Define power of lens and state its SI unit
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Answer: Power of lens is known as the inverse of the focal length of the lens measured in meter(m). S.I unit of power = Dioptre (D) Power of lense = 1/ focal length in meter. The focal length of 1st lense f1 = 40 cm = 0.4 m.
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Answer:Power of lens is known as the inverse of the focal length of the lens measured in meter(m).
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