A spherometer has 250 equal divisions marked along the periphery of its disc, and one full rotation of the disc advances by 0.0625 cm on the main scale. What is the least count of the spherometer ?

Answer

`2.5 xx 10^(-4)` cm

Explanation

L.C. = `(0.0625)/(250)` cm = `2.5 xx 10^(-4)` cm