Which consequence results when a brass astrolabe's alidade warps due to uneven heating during daytime use?

💡 Explanation

When an alidade warps unevenly due to sunlight induced thermal expansion, angular inaccuracies appear because sighting arm deviates, altering altitude. Therefore inaccurate altitude readings result, rather than hygroscopic expansion, errors, or differential corrosion, which require other environmental agents and different mechanisms.

• Which optical effect allowed Alhazen (Ibn al-Haytham) to more accurately predict the angular height of the visible atmosphere?
• Which effect reduced trebuchet range if counterweight mass was significantly decreased during a siege?
• Which mechanical weathering risk accelerated the Roman roads degradation in mountainous regions?
• Which risk increases when improperly-terraced chinampas used for maize cultivation experience heavy rainfall?
• Which navigational error increases aboard an 18th-century ship following thermal stressing a brass sextant?
• Which risk increases when a Roman road's drainage ditches become blocked with debris?