Which optical effect explains Ibn al-Haytham's observation that the perceived size of celestial objects increases near the horizon?

💡 Explanation

When viewing celestial objects, size perception changes near the horizon because the brain interprets them relative to foreground objects creating size illusions. Therefore, relative size perception accounts for perceived size increase, rather than refraction, chromatic aberration or light scattering, which alter light's physical properties, not perceived size.

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