Question

Question 2.7 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 3.5 mm. What is the estimate on the thickness of hair?

Class XI Physics Units And Measurements Page 35

Answer 1

Heya,Get Your answer through Me.Want or not?
Here is..
Solution :

Given that magnification = 100

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

Actual estimate  thickness of hair = average width on field of view / magnification

                                                                   =3.5 mm / 100  = 0.035 mm


Answer:  estimate on the thickness of hair = 0.035 mm 

Answer 2

Hlo


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

Hope this answer will help u..