Question
The Vernier scale of a travelling microscope has 50 divisions which coincides with 49 main scale divisions. If each main scale division is $0.5 \mathrm{~mm}$, then the least count of the microscope is
The Vernier scale of a travelling microscope has 50 divisions which coincides with 49 main scale divisions. If each main scale division is $0.5 \mathrm{~mm}$, then the least count of the microscope is