what s S.I. unt of power.A convex lens has a focal length of 50cm.calculate its power.
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The SI unit of power is Diopter
Power = 1/focal length (in metres)
Convex lens' focal point lies on the right side of the optical center so focal length will be positive
focal length = 50cm = 0.5m
Power = 1/0.5
= 2 Diopter
Power = 1/focal length (in metres)
Convex lens' focal point lies on the right side of the optical center so focal length will be positive
focal length = 50cm = 0.5m
Power = 1/0.5
= 2 Diopter
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