Question

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

Answer 1

Hii dear,

# Answer- 0.035 mm

## Explanation-
# Given-
Observed thickness = 3.5 mm
Magnification m = 100

# Solution-
Magnifiying power of a microscope is given by formula,
Magnification = observed value/actual value
Hence, here
Actual thickness = observed thickness/magnification
Actual thickness = 3.5/100
Actual thickness = 0.035 mm

Hence, actual estimate of thickness of hair is 0.035 mm.

Hope that solved your query.
Keep asking.

Answer 2

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Magnification of the microscope = 100

Average width of the hair in the field of view of the microscope = 3.5 mm

∴Actual thickness of the hair is

3.5/100

= 0.035 mm.

I hope, this will help you

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