Question

Parallax error can be avoided if_________​

Answer 1

Answer:

Measurements made by viewing the position of some marker relative to something to be measured are subject to parallax error if the marker is some distance away from the object of measurement and not viewed from the correct position.

Orient your line of sight directly above the measurement marking on a ruler or similar device so that an imaginary vertical line connects your eye, the marking and the object. ... Read the lower part of the curved surface of the liquid -- the meniscus -- to gain an accurate measurement and avoid parallax errors.

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