Question

What is parallax error ? how can u rectify it ?

Answer 1

Answer:

Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines. How to Reduce Parallax Error

Orientation of eyes should be in a straight line. ...

Place the measuring device on its edge. ...

Use a fine-edged device. ...

Read the lower meniscus of liquid to get an accurate measurement. ...

Take the average of readings.