A telescope is said to be inverted if its
- AVertical circle is to its right and the bubble of the telescope is downCorrect
- BVertical circle is to its right and the bubble of the telescope is up
- CVertical circle is to its left and the bubble of the telescope is down
- DVertical circle is to its left and the bubble of the telescope is up
Solution
Concept
Face right observation
Step-by-step solution
1. Face left: vertical circle on the left of the telescope, bubble up (normal). 2. Face right: vertical circle on the right of the telescope, bubble down (inverted).
Explanation
A telescope is inverted (face right, or "transit" position) when the vertical circle is to its right and the altitude bubble is down. In the normal position the vertical circle is to the left and the bubble is up.
Shortcut
FL: circle left, bubble up. FR: circle right, bubble down.
Common mistake
Mixing up the positions.
Correct answer: A) Vertical circle is to its right and the bubble of the telescope is down