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Object placed in front of a concave mirror At distance x cm from pole gives 3times magnification if it is moved at distance x+5 cm magnification of image becomes 2 focal length of mirror is
Dear student m1 = -f + u/-f = 3 2 f = 3u alsom2 = -f / -f + (u+5) = 2 now solve both equation, f = – 30 cm hope it helps
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