Civil Engineering - Surveying - Discussion
Discussion Forum : Surveying - Section 6 (Q.No. 34)
34.
The imaginary line passing through the intersection of cross hairs and the optical centre of the objective, is known as
Discussion:
13 comments Page 1 of 2.
Shoaib said:
4 years ago
Line of sight is the imaginary line passing through the intersection of crosshairs and optical centre of the objective whereas Line of collimation is the imaginary line passing through the centre of the eyepiece and the optical centre of the objective.
Thus the correct answer is line of sight.
Thus the correct answer is line of sight.
(3)
Christine Dela Rosa said:
6 years ago
I think when the line of collimation is horizontal, that would be the time when the line of collimation and the line of sight becomes the same. The line of sight is always horizontal, while the collimation the deviation from the true line of sight which is horizontal.
Shoaib manzoor lone said:
4 years ago
Line of sight is an imaginary line joining the point of intersection of crosshairs of diaphragm and optical centre of the objective.
Line of collimation, during levelling line of sight becomes horizontal thus at that point line of sight becomes line of collimation.
Line of collimation, during levelling line of sight becomes horizontal thus at that point line of sight becomes line of collimation.
(1)
Rathi said:
1 decade ago
Line of collimation : Imaginary line passing through the intersection of the cross-hairs of the diaphragm and the optical centre of the objective lens.
Axis of telescope : line joining the optical center of the objective to the center of the eyepiece.
Axis of telescope : line joining the optical center of the objective to the center of the eyepiece.
Narayan said:
5 years ago
Line of sight is the correct answer. Line of sight is called a Line of collimation when the bubble tube is at the centre. Otherwise, it is just a line of sight.
Ganesh Chaudhary said:
5 years ago
The line of collimation and line of sight is the same then why the answer is a line of collimation? Please explain to me.
PRABHAKAR GUPTA said:
6 years ago
If the line of sight becomes horizontal then it is called as line of collimation.
(2)
Abhishek said:
8 years ago
Line of sight becomes line of collimation when it comes in horizontal plane.
Ajay kumar said:
1 decade ago
Line of collimation is also known as the line of sight.
Abhijendra said:
9 years ago
Line of Collimation and line of sight are same.
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