Which measurement indicates the Vernier scale graduation of a micrometer?

The Vernier scale on a micrometer is designed to provide a precise measurement by allowing users to interpolate between the marked graduations on the main scale. In this case, the appropriate graduation for a typical Vernier scale on a micrometer is .0001 inches or millimeters, depending on the unit of measurement being used. This level of precision is achieved through the finely graduated scale that enables the user to read measurements with an accuracy that exceeds that of the main scale.

The other options do not provide the correct level of precision found in a micrometer's Vernier scale. A graduation of .001 would suggest a degree of precision typically associated with standard calipers, while .01 and .1 represent increasingly lower levels of precision that are not representative of the fine measurements allowed by a micrometer's Vernier scale. Thus, .0001 is the graduation that accurately reflects the measurement capabilities offered by the Vernier scale of a micrometer.