Mention the various precautions that you must keep in mind while taking measurements of the length of an object.
Answers
Answer:
The most common form of error associated with measuring instruments is the parallax error. Parallax is a term which originates from the Greek word “parallax” which means “alteration”. Parallax error occurs when an object is observed from an angle. This makes the object appear at a slightly different position than it really is and can lead us to take a wrong reading on a measuring scale. To eliminate this error the observer should position his eyes directly above the scale when taking the Main Scale reading and the Vernier Coincidence.
Explanation:
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The precautions to be taken while using a meter scale to measure lengths are as follows : (1) The scale should be placed to the side of the object being measured. It should also be in touch with the object being measured. (2) While reading the scale, eye must be placed vertically above the scale mark being read.