How parallax introduces errors in reading analog meters?
Answer:
You get parallax errors with analogue meters if you don't align your eye so that it is perpendicular to the pointer. When this happens the pointer can appear to line up with the wrong mark on the scale. The further your point of view is away from the perpendicular, the greater the error.
The potential for errors can be reduced by minimizing the gap between the pointer and the scale or better still fitting a mirror behind the pointer so that it is in the same plane as the scale. The mirror assists the viewer find the correct point of view, since in this condition (correct point of view) the reflection of the pointer will be hidden behind the pointer.
The potential for errors can be reduced by minimizing the gap between the pointer and the scale or better still fitting a mirror behind the pointer so that it is in the same plane as the scale. The mirror assists the viewer find the correct point of view, since in this condition (correct point of view) the reflection of the pointer will be hidden behind the pointer.
Related answers: - How do you avoid parallax error when taking a meniscus reading? View the meniscus from a 0/180 degree angle.. i.e hold it up to your eyes and take the...
- How is the parallax error avoided when reading a vernier instrument? By keeping Ur eyes perpendicular to the vernier and main scale while taking the measurement.
- How much error is acceptable in analog PF meter? Old type, analog power factor meters may be considered 2% instruments.
- What is a parallax error? Parallax, more accurately motion parallax, is the change of angular position of two observations...
Can you answer these? 