micrometer conversions

[roy5995]

What is the difference between 1\mum and 1nm? What are they called? are they micrometer and nanometer?

How much of a mm are they???

[Jimmy]

A nanometer (nm) is 10^-9 meters

A micrometer(um) is 10^-6 meters

A millimeter(mm) is 10^-3 meters.

Sometimes a micrometer is called a micron.