Surveying - Engineering

Q1:

Cross hairs in surveying telescopes, are fitted

A in the objective glass

B at the centre of the telescope

C at the optical centre of the eye piece

D in front of the eye piece.

ANS:D - in front of the eye piece.

The cross hair is not a point that can place at the optical centre it is a diagram in the front of the eye piece. Given Answer is correct because Crosshair is placed on an optical center of the diaphragm which is in front of an eyepiece.