Question

Power of a len can be represented as
a) P=100xf (cm) (b)P=F/100 (cm)
c) P= f×10(cm) (d) P=1 / f (m)
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Answer 1

Answer:

d) P = 1/f( in metre)

power of lens:-

power of lens is defined as the reciprocal of the focal length in metres. Its si unit is Dioptre (D)

.

power of a convex lens is always positive

. power of concave lens is always negative.

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