The line joining the point of intersection of cross hairs and optical centre of the object glass and its continuation
ALevel line
BAxis of telescope
CHorizontal line
DLine of collimation
No.1 PSC Learning App
★
★
★
★
★
Related Questions:
The moment required to rotate the end ofa beam, while acting on it, through a unit angle, without translation of the far end is known as
Which device enables different flow rate of oil?
For directly applying Simpson's rule for calculating volume of earthwork, the number of cross sections must be:
The drinking water will be safe if its biochemical oxygen demand (B.O.D) is
Ratio of inertia force to viscous force is called