The distance between the object and real image is D. If the magnification is m, find the focal length .
Asked by Paraukkhal | 26th Jan, 2011, 08:27: PM
M = 1/f
1/f = 1/D + 1/D
1/f = 2/D = M
f = 1/M = D/2
Hope this helps.
Answered by | 26th Jan, 2011, 09:12: PM
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