JEE Main 2008 Physics question

Physics Experimental Skills JEE Main 2008

An experiment is performed to find the refractive index of glass using a travelling microscope. In this experiment distance are measured by

(1)a vernier scale provided on the microscopeCorrect
(2)a standard laboratory scale
(3)a meter scale provided on the microscope
(4)a screw gauge provided on the microscope

Answer: (1)

Solution

A travelling microscope moves along a main scale fitted with a vernier, and real/apparent depths are read on this vernier scale, option (1).

Question ID VK-039031