Theodolite Telescope Swing Plane
The term "swing" in the context of a theodolite refers to the rotation of the telescope around the instrument's vertical axis.
This rotational movement allows the instrument to sight targets at different horizontal angles.
Plane of Rotation
The swinging motion of the theodolite telescope occurs in a plane parallel to the ground surface. This plane is known as the:
- Horizontal plane: This plane is perpendicular to the direction of gravity. When the theodolite telescope swings, it sweeps across this plane.
Movement in the vertical plane involves the telescope tilting up or down around its horizontal (trunnion) axis, which is not referred to as swinging.
Therefore, the theodolite telescope swings in the horizontal plane.
Important Questions from Compass Surveying and Theodolite
What is the difference of longitude between two places C and D from the following longitudes ?
1. Longitude of C = 46° W
2. Longitude of D = 64° W
Arrange the order of permanent adjustment of a theodolite.
1) Plate level test
2) Cross- hair ring test
3) Bubble tube adjustment test
4) Spire test
5) Collimation in azimuth test
6) Vertical circle test
Isogonic lines are the lines having the same _______.
Which one of the following statements is correct?
Which optical element's movement within a telescope typically enables internal focusing while maintaining a constant physical length of the instrument?
