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← HistoryWhich consequence results from thermal expansion on a brass sextant arc?
A)Reduced index error at colder temperatures
B)Increased limb error at warmer temperatures✓
C)Minimized prismatic error during rapid changes
D)Compounded backlash error near zero Celsius
💡 Explanation
Increased limb error occurs because thermal expansion causes distortion of the scale, creating inaccuracies. This mechanical phenomenon affects angular measurement. Errors increase with greater temperature changes; therefore, option B is correct, rather than others minimizing or reducing errors at certain temperatures.
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