Question

How can parallax error be avoided?

Answer 1

Hint: In order to answer this question, first of all we need to know about the parallax error. Also, we need to know that the parallax error can lead us in taking incorrect reading while taking the measurement. After that, we can finally conclude with the answer of the given question.

Complete answer:
First of all let us find out about the parallax error.
We can say that there is a parallax error if we find shifts in the position of an object when we view the same object from different angles while taking the measurement of that object.
Now, we need to find out the measure to avoid parallax error.
For this we need to see directly above the device while taking the measurement so that an imaginary vertical line connects our eye and we consider that distance as the reading of the measurement.
Therefore, we can conclude that to avoid parallax error we need to place the object as near to the scale of the measuring scale as possible and place our eye directly above the measuring scale.

Note: Generally, parallax error takes place when the measurement of the length of a body is either less or more than the actual length. Parallax error takes place, when we measure the length from a different angle. Parallax error is common while taking the measurements. So, for that we need to place our eye correctly as parallax error generally takes place due to the wrong positioning of the eye.