Question

Calibration of ocular micrometer: stage micrometer is a glass slide having precisely spaced lines etched at know intervals, the smallest space in stage micrometer is 1 µm. The length of 1 ocular unit (the smallest single space of ocular micrometer) is ________ µm.

Answer 1

The correct answer is 0.2 micrometers. Since 5 single spaces of the ocular micrometer fit in one space of the stage micrometer. That is 5 single spaces of the ocular micrometer = 1 space of the stage micrometer (which stands for 1 micrometer).