In what si unit is power of lenses rated? A convex lens has a focal length of 50 cm calculate its power
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the SI unit of power is diopter .
f= 50 cm = 0.5 m
hence
P= 1/0.5
=2 D
f= 50 cm = 0.5 m
hence
P= 1/0.5
=2 D
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