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← HistoryWhich consequence results from excessive temperature variation inside a brass frame sextant?
A)Accuracy degradation from thermal expansion✓
B)Lubricant breakdown on the index arm
C)Mirror silvering de-adhesion increases
D)Increased hygroscopic lens distortion slowly
💡 Explanation
Inaccuracy arises due to differential Thermal expansion, since brass expands and contracts unevenly across the sextant frame, shifting the alignment of the mirrors and index arm; therefore, accuracy worsens, rather than lubricant issues or silvering failures impacting immediate readings.
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