Which limitation influences astrolabe precision during celestial altitude measurement?

💡 Explanation

When measuring altitude, atmospheric refraction bends the light path because atmospheric density changes with altitude causing distortion, and therefore introducing error in altitude readings. Thus, atmospheric refraction is the limiting factor, rather than obstructing the view, mechanical failures, or thermal expansion, which present different mechanical/optical limitations.

• Which outcome improves after terrace farming reduces soil erosion on steep Andean slopes?
• Which benefit resulted from the development of nixtamalization by Mesoamerican civilizations for processing maize?
• Which risk increases when pre-Columbian terrace farming in the Andes reduces soil organic matter during intensive maize cultivation?
• Which structural issue was mitigated by Brunel's use of wrought iron chains in the Clifton Suspension Bridge construction?
• Which structural problem emerges when a cantilever bridge experiences excessive asymmetrical loading?
• Which soil failure risk is MOST increased when rainfall intensity exceeds terraced field drainage capacity?