to calculate the least count of travelling microscope first see the no. of division on the main scale say between 12 and 13 there are 20 divisions and the no.of division on vernier scale is 50 then
1 msd = 20 division
1 division = 1/20 msd=0.05
1vsd = 50 division
least count = msd/vsd
=0.05/50=0.001
so least count is 0.001 cm
hai bye
the least count of travelling microscope = 0.001 cm
the least count of travelling microscope = 0.001 cm
.001 mm
digital micrometer least count calculation
The least count of the micrometer screw can be calculated using the formula given below: Least count = 0.01 mm
0.1 degree
follow
1degree
pitch /no of divisions of micrometer barrel
The importance of least count ( the highest degree of accuracy of measurement) helps calculate the margin of errors when doing measurements.
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).