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Which risk dramatically increases when an optical interferometer approaches a black hole?

A)Tidal forces destroy alignment
B)Quantum entanglement decoherence begins
C)Spacetime curvature alters distances
D)Laser frequency undergoes redshift

💡 Explanation

Spacetime curvature near extreme mass causes differential path length changes in the interferometer arms because gravity as described by general relativity warps spacetime itself. Therefore, accurately measuring distances becomes harder with increased curvature, rather than tidal disruption being catastrophic to solid matter.

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