Question

How to find least count of travelling microscope?

Answer 1

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

hope it helps :)