Which principle increased the accuracy of parabolic surveying mirrors crafted during the Islamic Golden Age?

💡 Explanation

To achieve high accuracy, minimizing spherical aberration in parabolic mirrors was critical because off-axis parallel rays do not focus at the same point, introducing error. Therefore, minimizing spherical aberration was essential rather than chromatic aberration (relevant to lenses), astigmatism (less controllable by manufacturing technology) or TIR coatings (usually for prisms).

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