The imaginary line passing through the in tersection of the cross hairs and the optical centre the objective is known as
AVertical axis
BLine of collimation
CAxis of the telescope
DAll ihe above
No.1 PSC Learning App
★
★
★
★
★
Related Questions:
A transmission shaft includes
A cross-drainage work carrying canal over the drainage is known as
One of a four centred arch, their all centres are located on a springing line is known as
The narrow strip of drawing board are joint together by joints.
_____________is an international environmental protocol on Biosafety to the Convention on Biological Diversity.