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 growth of hair in the field of view of microscope is 3.5 mm. What is estimate on 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 value/magnification
Actual thickness = 3.5/100
Actual thickness = 0.035 mm

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

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