A student measures the thickness of a human hair using a microscope of magnification 100. He makes 20 observations and finds that the average thickness (as viewed in the microscope is 3.5 mm). What is the estimate of the thickness of hair?

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Solution

Magnification $= 100$ .
Avg. width in Microscope $= 3.5 m m$
So,
Original width $= \frac{3.5 m m}{100} = 0.035 m m$

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A student measures the thickness of a human hair using a microscope of magnification 100. He makes 20 observations and finds that the average thickness (as viewed in the microscope is 3.5 mm). What is the estimate of the thickness of hair?

Magnification=100.Avg. width in Microscope =3.5mmSo,Original width =3.5mm100=0.035mm

Magnification $= 100$ .
Avg. width in Microscope $= 3.5 m m$
So,
Original width $= \frac{3.5 m m}{100} = 0.035 m m$