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Refraction error is the least in case of
- a)Stadia tacheometry
- b)Tangential tacheometry
- c)Subtense bar tacheometry
- d)Omnimeters
Correct answer is option 'C'. Can you explain this answer?
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Refraction error is the least in case ofa)Stadia tacheometryb)Tangenti...
Subtense bar tacheometry
Subtense bar tacheometry is a method of tacheometry where a subtense bar is used to measure horizontal distances. The subtense bar is placed at the instrument station and the target is located at the point where the distance is to be measured.
Explanation:
- In subtense bar tacheometry, the refraction error is minimized because the line of sight is kept close to the ground. This reduces the effect of atmospheric refraction on the measurement.
- The subtense bar is kept horizontal, ensuring that the line of sight is not inclined, which further reduces the refraction error.
- Since the subtense bar is placed close to the ground, the measurement is less affected by atmospheric conditions that cause refraction.
- The use of a subtense bar provides a more accurate and reliable method of measuring distances compared to other tacheometry methods.
In conclusion, subtense bar tacheometry is the method where refraction error is the least due to its specific technique of measurement that minimizes the impact of atmospheric refraction.
Subtense bar tacheometry is a method of tacheometry where a subtense bar is used to measure horizontal distances. The subtense bar is placed at the instrument station and the target is located at the point where the distance is to be measured.
Explanation:
- In subtense bar tacheometry, the refraction error is minimized because the line of sight is kept close to the ground. This reduces the effect of atmospheric refraction on the measurement.
- The subtense bar is kept horizontal, ensuring that the line of sight is not inclined, which further reduces the refraction error.
- Since the subtense bar is placed close to the ground, the measurement is less affected by atmospheric conditions that cause refraction.
- The use of a subtense bar provides a more accurate and reliable method of measuring distances compared to other tacheometry methods.
In conclusion, subtense bar tacheometry is the method where refraction error is the least due to its specific technique of measurement that minimizes the impact of atmospheric refraction.
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Refraction error is the least in case ofa)Stadia tacheometryb)Tangential tacheometryc)Subtense bar tacheometryd)OmnimetersCorrect answer is option 'C'. Can you explain this answer?
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