Q. Cross hairs in surveying telescopes, are fitted (Solved)
1. in the objective glass
2. at the center of the telescope
3. at the optical center of the eye piece
4. in front of the eye piece.
- d. in front of the eye piece.
1. in the objective glass
2. at the center of the telescope
3. at the optical center of the eye piece
4. in front of the eye piece.