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![[Post New]](/templates/default/images/icon_minipost_new.gif) 3 Feb 2007 22:26:33 IST
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A student measures the thjickness of a human hair by looking at it through a microscope of magnification 100. He makes 20 observations and finds that the avg. width of the hair in the field of view of microscope is 3.5mm. what is the estimate on the thickness of hair?
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The left image is Bihar in 2020 |
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4 Feb 2007 15:12:53 IST
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w=100
omega=20
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4 Feb 2007 15:42:08 IST
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Reply to it properly. I dint get you sourabh1212
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6 Feb 2007 16:41:41 IST
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How to do this
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The left image is Bihar in 2020 |
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9 Feb 2007 22:04:04 IST
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please try this everyone
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9 Feb 2007 22:04:30 IST
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i too culdnt solve it
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10 Feb 2007 00:07:04 IST
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Magnification of 100 means two points seperated by unit distance will appear to be seperated by 100 units in microscope.
If thikness of hair is 3.5 mm in microscope, its true thickness is 3.5/100=0.035mm
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Krishna Gopal Singh
B.Tech Chemical Engg
IIT Delhi 2002
Currently doing PhD from IIT Delhi |
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11 Feb 2007 15:52:32 IST
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Thickness=.035mm
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11 Feb 2007 15:53:40 IST
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true thickness=.035 mm
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13 Feb 2007 10:39:19 IST
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Magnification by 'n' times means increasing the overall dimensions of the object by 'n' tines. Hence in this sum, the actual dimensions can be given if the observed dimensions are diminished by 100 times. Hence we have the ans to be 3.5/100=.035mm
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