Within Alhazen's work on optics, 'Al-Manazir', which algebraic problem limited derivation of accurate lens refraction angles?

💡 Explanation

When determining refraction, Alhazen faced 'Alhazen's problem,' needing intersection points which required solving a specific quartic equation geometrically because no general algebraic formulas existed then. Therefore solving quartic equations limited accurate refraction, rather than integrals, trigonometry or conic sections which were solved with other means.

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