Question

The focal length of a convex lens is 10m,then find its power of lens?
please solve.

Answer 1

➡given :
focal length = +10 m

Power = 1/focal length
= 1/10
= 0.1 D

➡power of the lens is +0.1 Dioptre

➡Also, remember that the power is always in positive because the light rays from infinity intersect at its F2 focus as its stated that its a convex lens

Hope it helps;-

Answer 2

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focal lenght(f)=10m

power of lens=D

formula of power of lens =
D=1/f
D=1/10
D=0.1d

the power of lens is 0.1 diopter.

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