If you mean the metric subdivisions, I suggest you search for "SI prefixes". Some extremely small prefixes are used, but they would normally not be used in your daily life for measuring lengths. The smallest divisions that are normally marked on a meter scale are the millimeters.
the least count of half meter rod is 25
In case for micrometer, principle of pitch is used. Least count could be even micro meter But in vernier caliper, difference of main scale division and vernier scale division is the principle Least count could be 0.02 mm
It is 0 K.
Least count = 1 Main scale division - 1 vernier scale division Why? The story is very interesting. That has been already explianed by me while answering such a question. Please....
Least count refers to the highest level of accuracy that can be achieved in measurement. The general formula is: LC = (Value of 1 Main Scale Division) / (Total number of Vernier scale divisions).
least count of scale is 1mm
the least count of half meter rod is 25
first find out least count of main circular scale in degrees,then divide least count of main scale by total divisions on cylindrical scale(this cylindrical scale works as vernier scale for fist one,its least count will be in minutes) then further divide least count of cylindrical scale by total divisions of small vernier scale which touches it,(this small scale works as vernier scale for cylindrical scale and its least count will be in seconds).
In case for micrometer, principle of pitch is used. Least count could be even micro meter But in vernier caliper, difference of main scale division and vernier scale division is the principle Least count could be 0.02 mm
Least count is the smallest form of measurement that a specific measuring instrument can accurately measure by. So meter stick uses 1m and 100cm and 1000mm. Thus mm is the least count for a meter stick.
micro meter least count in British system
least count of a micrometer= pitch/no of division on the circular scale
-459.67
.02mm
It is 0 K.
Generally least count of micrometer varies instrument to instrument.. But common micrometers which are used in institute level laboratories have least count of 0.0001mm
1)Main Scale is fixed(It does not move) Vernier scale slides along main scale.2)Least count of Mainscale is 0.1cmLeast count of vernier scale is 0.01cm