The line joining the intersection of the cross hairs to the optical centre of the object glass and its continuation is called as
a) Line of collimation
b) Telescopic axis
c) Vertical axis
d) Horizontal axis
The line joining the intersection of the cross hairs to the optical centre of the object glass and its continuation is called as
a) Line of collimation
b) Telescopic axis
c) Vertical axis
d) Horizontal axis
