While viewing through a level telescope and moving the eye slightly, a relative movement occurs between the image of the levelling staff and the cross hairs. The instrument is
Options
A. correctly focussed
B. not correctly focussed
C. said to have parallax
D. free from parallax.
Correct Answer
said to have parallax
More questions
1. Pick up the incorrect statement from the following :
Options
A. Free surface ground water is subjected to atmospheric pressure
B. Water table surface rises and falls with seasons
C. Depth of water table is directly proportional to the rate of drawal of water