Give reason of the followingeyes should be kept vertically above the e

1.	Give reason of the followingeyes should be kept vertically above the end where reading is to be taken
Answer» ANSWER: The eye MUST be kept vertically above the end of the object so that the corresponding graduation can be read CLEARLY. If the eye is not kept exactly vertically above the end of the object, it leads into error CALLED parallax error.

Give reason of the followingeyes should be kept vertically above the end where reading is to be taken

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