JEE Main 202226 Jun, Evening shiftPhysicsMediumUnits and Measurements122× since 2002
A travelling microscope is used to determine the refractive index of a glass slab. If 40 divisions are there in 1 cm on main scale and 50 Vernier scale divisions are equal to 49 main scale divisions, then least count of the travelling microscope is __________ 10^6 m.