It's impossible to measure.
1 nanometer, can also be written as 1nm. A very small unit of length.
nanometer (nanometer) is a measure of length. The symbol of the International System of Units is nm.
1 nanometer =10^-9 meters, the length unit is like the centimeter,
The decimeter, like the meter, is a measure of length.
One nanometer is four times the size of an atom, much smaller than the length of a single bacterium. The international common name is nanometer, short for nm.
Individual bacteria are virtually invisible to the naked eye, measuring about five microns in diameter with a microscope.
Suppose the diameter of a hair is 0.05 mm, and it is split axially into an average of 50,000 strands, each of which is about 1 nanometer thick. In other words, 1 nanometer is 0.000001 mm.
At present, the microscopic scale of many materials is mostly in nanometers, such as most semiconductor process standards are expressed in nanometers