Which constraint limited the accuracy of equatorial sundials used in medieval Islamic observatories?

💡 Explanation

Atmospheric refraction bends light rays, therefore medieval measurements of solar angle were incorrect; the effect on sundials increases nearer the horizon, rather than being caused only by mechanical errors or celestial factors such as orbital precision.

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• Which consequence results when lime in ancient Greek fire mixtures underwent uncontrolled hydration?
• Which limitation affects agricultural output from Inca terraces due to progressive rock-soil weathering?
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