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← ScienceWhich relativistic effect increasingly distorts arrival timing signals through optical fiber spanning 1000 km across Earth's surface?
A)Sagnac effect due to Earth's rotation✓
B)Atmospheric dispersion delays photons
C)Gravitational time dilation with altitude
D)Quantum entanglement causes signal scrambling
💡 Explanation
The Sagnac effect, an effect of general relativity, causes path-dependent time shifts because the co-rotating or counter-rotating path modifies spacetime intervals unevenly. Therefore, it distorts timing, rather than altitude-based time dilation or unrelated quantum effects, whose conditions differ greatly.
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