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In measurement with theodolite, when vertical circle of telescope is to the right of the observer and the bubble is down, is termed as,
  • a)
    Telescope normal
  • b)
    Telescope swing
  • c)
    Telescope direct
  • d)
    Telescope inverted
Correct answer is option 'D'. Can you explain this answer?
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In measurement with theodolite, when vertical circle of telescope is t...
The position of theodolite in which the vertical circle of instrument is to the right of the observer and the bubble is down, is called telescope inverted. The observations taken in face right position are known as face right observations. In face right position the bubble is at the bottom hence it is also called as bubble down position.
Telescope normal, telescope direct and bubble up position are face left positions.
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In measurement with theodolite, when vertical circle of telescope is t...
Explanation:

Theodolite is an optical instrument used for measuring horizontal and vertical angles in surveying and engineering applications. It consists of a telescope mounted on a tripod with a rotating horizontal and vertical circle.

When the vertical circle of the theodolite telescope is to the right of the observer and the bubble is down, it is termed as "Telescope Inverted".

Telescope Inverted:
- The term "inverted" refers to the orientation of the telescope with respect to the observer.
- In a theodolite, the telescope can be oriented in two ways - normal and inverted.
- In the normal position, the telescope is positioned with the eyepiece at the top and the objective lens at the bottom.
- In the inverted position, the telescope is positioned with the eyepiece at the bottom and the objective lens at the top.
- When the telescope is in the inverted position, the vertical circle is to the right of the observer and the bubble is down.

Significance:
- The orientation of the telescope affects the reading of the vertical angles measured using the theodolite.
- In the inverted position, the vertical angles are measured in the opposite direction compared to the normal position.
- When the telescope is inverted, the vertical angles are measured clockwise from the lower station to the upper station.
- This is in contrast to the normal position, where the vertical angles are measured counterclockwise from the lower station to the upper station.

Uses:
- The inverted position of the telescope is used in certain surveying applications where the clockwise measurement of vertical angles is preferred.
- It is commonly used in mine surveying and tunneling, where the vertical angles are measured with respect to the horizontal plane of the mine or tunnel.

In conclusion, when the vertical circle of the theodolite telescope is to the right of the observer and the bubble is down, it is referred to as "Telescope Inverted". This orientation is used in certain surveying applications where clockwise measurement of vertical angles is preferred, such as in mine surveying and tunneling.
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In measurement with theodolite, when vertical circle of telescope is to the right of the observer and the bubble is down, is termed as,a)Telescope normalb)Telescope swingc)Telescope directd)Telescope invertedCorrect answer is option 'D'. Can you explain this answer?
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