Parallax error when reading a scale is avoided by:

  1. keeping the eye perpendicular to the scale
  2. taking only one reading
  3. using a longer scale
  4. reading quickly
Answer

A) keeping the eye perpendicular to the scale

Viewing at an angle shifts the apparent reading. SLO P-11-A-05 · Application

Physics MCQ · More Physical Quantities and Measurement MCQs · Practise