Find the focal length of a lens of power 2.0D. What type of lens is this??
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as p=1/f
F=1/p
f=1/-2.0
f=-0.5m
as focal length is negative it is a concave lens
F=1/p
f=1/-2.0
f=-0.5m
as focal length is negative it is a concave lens
aryan2deb:
Thanks
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