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← HistoryWhich optical consequence would inaccurate lens grinding introduce to a medieval astrolabe sighting device?
A)Chromatic aberration due to index variations
B)Spherical aberration blurring the image✓
C)Coma distorting off-axis targets
D)Astigmatism stretching point sources
💡 Explanation
When lens grinding becomes inaccurate, spherical aberration occurs because outer lens regions focus light at a different point than the center, resulting in a blurred image. Therefore a blurred image from spherical aberration instead chromatic aberration, coma, or astigmatism, resulting from separate optical imperfections.
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