when an object of height 2 cm is palced at 12 cm from a convex lens its erect three times magnified image is formed by a lens find focal length
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Answered by
11
Hiii....
Focal length = 9 cm ....
Focal length = 9 cm ....
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Answered by
8
Helloo!!
Magnification = 3 times!
hi/h° = 3
Then
v = 3u
lens Formula
1/f = 1/v -1/u
1/3u -1/u = 1/f
F = 3u^2/2u
F = 3x12/4
F = 9 cm
Magnification = 3 times!
hi/h° = 3
Then
v = 3u
lens Formula
1/f = 1/v -1/u
1/3u -1/u = 1/f
F = 3u^2/2u
F = 3x12/4
F = 9 cm
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