the power of lens is 1D, then focal length is
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if P is 1D then f is 1/10
that is 0.1
that is 0.1
mukeshsinghx17:
nope
nope
it is 1m right ?
1 dioptre is SI unit of the power of a lens whose focal length is 1 metre. It is denoted by the letter D. Thus 1D = 1 m-1. Simply, when focal length ‘ f ‘ is expressed in metres, then, power is expressed in dioptres. The power of a convex lens is positive and that of a concave lens is negative.
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22
1m is the length of the focal
1m is correct
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