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← HistoryWhen using a brass astrolabe across different dates, which error increases if the instrument's alidade is slightly warped?
A)Parallax error in celestial altitudes✓
B)Reduced optical resolution of shadow
C)Systematic time drift on star transits
D)Deformations based on ambient temperature
💡 Explanation
A warped alidade introduces angular misalignment; thus parallax error emerges because altitude readings become inconsistent varying with celestial object position. Therefore, altitude measurements become inherently inaccurate rather than affecting resolution or temperature sensitivity.
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