the power of a lens is -2D ..then what is its focal length?
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heya,
.
power of lens=1/f
-2=1/f
f=-1/2.
focal length is -1/2
hope it help you .
.@rajukumar
.
power of lens=1/f
-2=1/f
f=-1/2.
focal length is -1/2
hope it help you .
.@rajukumar
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