InterviewSolution
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InterviewSolution
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The power of a lens of focal length 25cm in diopter is:-(a)0.25D (b)2.5D (c)4.0D (d)0.4D |
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Answer» Its depend on lens. If lens is concave then -4, if lens is convex the +4 +4 right answer hai ya fir -4please yarr confusion clear kar do Sorry but +4 is right ans Here,\xa0P=?f=−25cmP=?f=-25cm\xa0As\xa0P = 100/f,f=100/−25=−4dioptre\xa0 0.25 Đ |
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