Which optical phenomenon did Alhazen (Ibn al-Haytham) primarily investigate to refine lens design during the Islamic Golden Age?

💡 Explanation

Alhazen studied spherical lenses and noted imperfections that resulted from chromatic aberration, where different wavelengths of light focus at different points because refraction varies with wavelength. Therefore Alhazen studied chromatic aberration allowing for better lens design, rather than polarization or diffraction which are different light phenomena, or atmospheric effects which are not lens-specific.

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