How do you calculate least count of spectrometer?

Answer 1

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)

Answer 2

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.

Answer 3

smallest no of division on main scale/ total no of vernier scale

Answer 4

Least Count = value of 1 main scale reading/total no.of vernier divisions.

Lc=30'/30=1'.

krishna sharma

Answer 5

value of 1 MSD/ no.of VSD for a vernier.

Answer 6

Least count of Spectrometer is: *