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Which observation arose because Medieval Islamic astronomers integrated Ptolemaic optics?

A)Atmospheric refraction changes star positions
B)Earth's orbit perfectly closes annually
C)Stars possess perfect uniform luminance
D)Planets rotate at constant velocity

💡 Explanation

Medieval scholars noted refraction, because careful application of Ptolemaic optics led to the discovery of varying air density with altitude leading to variable bending of light. Therefore, stellar positions appear shifted, rather than remaining fixed as earlier observational data indicated.

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