State the nature and focal length of a lens with power +10D?
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P = 100/f(in cm)
10 = 100/ f
10f = 100
f = 100/10=10 cm or 0.1 m
as focal length is positive so it is a convex lens.
hope it helps.
10 = 100/ f
10f = 100
f = 100/10=10 cm or 0.1 m
as focal length is positive so it is a convex lens.
hope it helps.
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