An imaginary line joining the point of intersection of the cross-hairs of the diaphragm and the optical centre of the object glass, is known as
A)fundamental line
B)axis of telescope
C)axis of level tube
D)line of collimation

Question

Quizplus · Accepted Answer

The line of collimation refers to the imaginary line that extends from the cross-hairs in the telescope's eyepiece through the optical center of the objective lens, used in surveying to define a line of sight.

An Imaginary Line Joining the Point of Intersection of the Cross-Hairs