Find the power of a concave lens of local length 2m.
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2 is the correct answer for this
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heya
Since it is a concave lens so the focal length of a concave lens is considered negative.
Thus,
Focal length f = -2cm= -2/100= -0.02cm
Power= 1/f(in m)
= 1/-0.02
= -50 dioptres.
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