Which optical effect contributed to Alhazen's improved accuracy in astronomical observations?

💡 Explanation

When light passes through the atmosphere, refraction causes the apparent position of celestial bodies to differ from their true position requiring correction, because the amount of refraction depends on the body's altitude and the atmosphere's density profile. Therefore atmospheric refraction modeling improved observations rather than using aberration, diffraction, or gratings that involve lens properties directly.

• Which mechanical effect most limited long-distance paved road construction during the Roman Empire?
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