Math Fun Library

Question :
How are the smallest measurements expressed ?

Answer :
There are two units in the measure of all small distances, the Micron(m) and the Angstrom unit (.u.).
A Micron is the millionth of a metre and there are about 25000 microns in an inch. One Angstrom unit equals one ten thousand millionth of a metre. One Micron equals 10,000 times the length of an Angstrom unit.
Breadth of a hair = 75b
Diameter of red blood corpuscle = 2m
Diameter of spherical bacterium = 0.5m
Diameter of molecule of water = 0.00205m or 2.5 A.m.