Question

An experiment is performed to find the refractive index of glass using a travelling microscope. In this experiment distances are measured by
(a) a screw gauge provided on the microscope
(b) a vernier scale provided on the microscope
(c) a standard laboratory scale
(d) a meter scale provided on the microscope.

Answer 1

(b) : A travelling microscope moves horizontally on a main scale provided with a vernier scale, provided with the microscope.