How does a vernier scale decrease the least count of a scale?
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If we use a metre scale for measurement of length, it may have graduations at 1 mm division scale spacing or interval. A Vernier scale on caliper may have a least count of 0.01 mm while a micrometer may have a least count of 0.001 mm. ... Instruments of higher precision can reduce the least count error.
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The least count as the name suggests is the finest measurement you can take with the help of that Vernier calipers. It is measured by dividing the least count of the main scale by the total number of divisions on the Vernier scale. The Least Count (LC) of Vernier scale is given as
Least count =Least count of main scale / Number of divisions on Vernier scale.
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