The value of each main scale divisions is half a degree(30') .
The number of vernier scale divisions is 30.
29 main scale divisions are divided into 30 vernier scale divisions (30 VSD = 29 MSD )
Therefore value of 1 VSD = 29/30 MSD.
Least Count (L.C.) = 1MSD - 1VSD
= 1MSD - 29/30 MSD
= 1/30 MSD
= 1/30 x 30'
(L.C.) = 1' (1 minute)
Finding least count of spectrometer
1. Count the total number of division on the vernier scale, say, n. Note the smallest
division on the circular scale in minutes, say, m minutes.
2. The least count is the smallest division divided by the number of divisions on the
vernier, i.e., it is m
n minutes.
smallest no of division on main scale/ total no of vernier scale
Least Count = value of 1 main scale reading/total no.of vernier divisions.
Lc=30'/30=1'.
krishna sharma
value of 1 MSD/ no.of VSD for a vernier.
Least count of Spectrometer is: *
Hi, heres how you calculate least count of a micrometer. Use the given formula: Least Count (L. C) = Pitch/no. of divisions on micrometer barrel(thimble) where, Pitch = distance travelled by thimble on linear scale in one rotation. Hi, heres how you calculate least count of a micrometer. Use the given formula: Least Count (L. C) = Pitch/no. of divisions on micrometer barrel(thimble) where, Pitch = distance travelled by thimble on linear sacle in one rotation.
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
look when u start ur stop watch if u get reading as 0.00 , then the least value measured by watch wiil be 0.01 ....which is ur least count...
1/16
o.1cm
spectometer is an instrument wnich measures the light passes through a prism
least count of a spectrometer is equal to 1' (one minute)
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
hai bye
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.
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
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).