Question
Download Solution PDFWhich levelling error occurs due to the bending of light rays as they pass through the Earth's atmosphere?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFRefraction Error in Levelling:
- Refraction error occurs when light rays bend as they pass through the Earth's atmosphere, especially when there are variations in air density, temperature, and pressure. This bending of light causes the observed object to appear at a different position than its actual location, leading to errors in levelling measurements.
- This error is common in long sight distances, and atmospheric conditions can cause significant deviations in measurements, which need to be accounted for.
Solution:
The correct choice is: Option 3) Refraction error
Last updated on Jun 4, 2025
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