Question

What is vernier callipers?​

Answer 1

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Vernier callipers is a device which is used to measure accurately the internal diameter of any cylindrical object, the length of an object and in measuring the depth of a beaker or a bottle. Diagram of vernier callipers: - Main parts and their functions: Main scale: It is used to measure length correct up to 1 mm.

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Answer 2

Answer:

A vernier scale is a visual aid to take an accurate measurement reading between two graduation markings on a linear scale by using mechanical interpolation; thereby increasing resolution and reducing measurement uncertainty by using vernier acuity to reduce human estimation error. Wikipedia

Purpose: Measuring more precisely than could be done unaided when reading a uniformly divided straight or circular measurement scale