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← HistoryWhich imaging defect arose earliest in Alhazen's lens experiments?
A)Chromatic spherical image aberration✓
B)Elliptical sagittal focal astigmatism
C)Comatic tangential asymmetric flares
D)Distorted barrel or pincushion effect
💡 Explanation
Spherical aberration was observed first, because light rays focus at differing points, creating a blurred image rather than a single clear focus, therefore explaining original challenges using early simple lenses; other aberrations required refined experiments.
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