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Which outcome occurs because measurement collapses previously entangled photons?

A)Instantaneous spin correlation at separation
B)Increased interference fringe visibility
C)Spontaneous emission acceleration
D)Increased quantum decoherence timescale

💡 Explanation

Instantaneous spin correlation occurs via quantum entanglement; measuring one photon's spin forces the other to adopt the correlated spin state due to wave function collapse. Therefore, measurement leads to correlation, rather than changes decoherence or interference effects.

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