Question

The eye of the observer should be in _____ while talking a reading using a ruler​

Answer 1

Answer:

In such conditions the eyes of the observer should be study and straight in front of the scale. There should be no angle other than 90° between the point of visibility and the scale.

Explanation:

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Answer 2

Answer:

The eye of the observer should be very carefull while talking a reading using a ruler

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