Question Detail
Question
A measurement error that occurs when the observer's eye is not positioned perpendicularly to the scale is known as
Correct Answer
Option D is the correct answer.
Detailed Explanation
Parallax error arises from viewing the scale at an angle rather than straight on. This causes the pointer or mark to appear displaced relative to the scale, leading to an incorrect reading.
Hint
This error can be minimized by ensuring the line of sight is directly in front of the measurement mark.