What is 0.02 least count?

The term "0.02 least count" refers to the smallest measurement that a measuring instrument can accurately read, with the value being 0.02 units. This specific least count is most famously associated with a Vernier caliper.

Least Count Explained: The least count of an instrument is its precision. It is the smallest value it can measure. For example, a standard ruler has markings for millimeters (mm), so its least count is 1 mm. It cannot accurately measure anything smaller than that.