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← HistoryWhich image artifact arises from imperfect Medieval Islamic astrolabes?
A)Chromatic blurring of projected stars
B)Spherical aberration in solar projection✓
C)Astigmatism affecting horizon lines
D)Optical density gradients and distortion
💡 Explanation
Solar projection astrolabes suffered from spherical aberration because uncorrected lenses focus rays differently based on aperture. Therefore, a blurred rather than sharply defined sun image appears; chromatic blurring is minimal and astigmatism affects specifically lens curvature unevenness.
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