Question

13. Assertion: While measuring the length, of the observer should be exactly above the
point of measurement to avoid the parallax error
Reason: The scale used to measure the length of the object must be greater than the length
of the object.​

Answer 1

Answer:

Answer:− A

There are three simple ways of reducing parallax error in that case:

1. Attach a straight object (like a ruler or straightened paperclip) to the thing you're measuring the displacement of, it should stick out of the object perpendicularly to the scale you're measuring the displacement on.

2. Make sure that object is as close to your scale as possible, but not touching.

3. Put your eyes level with the object, and as close to it as you safel