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Units and Measurements — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsUnits and Measurements2 Marks
Question
A student measures the thickness of a human hair by looking at it through a microscope of magnification 100. He makes 20 observations and finds that the average width of the hair in the field of view of the microscope is 3.5mm. What is the estimate on the thickness of hair?
✓

Answer

Magnification of the microscope = 100 Average width of the hair in the field of view of the microscope = 3.5mm $\therefore$ Actual thickness of the hair is 3.5/100 = 0.035mm

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