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.

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