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← HistoryWhich consequence increases when an astrolabe experiences differential thermal expansion?
A)Diminished alidade accuracy✓
B)Increased star visibility
C)Elevated brass tarnish rate
D)Reduced plate thickness
💡 Explanation
Differential thermal expansion causes warping which affects the alignment through thermal stress gradients of the alidade. The alidade's pointing accuracy diminishes because the materials expand differently across the instrument plates; therefore, angular measurements become unreliable, rather than accurate.
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