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Which outcome reduces speckle noise when combining overlapping holographic images?

A)Temporal coherence averaging cancels interference
B)Decreased exposure broadens fringes
C)Spatial multiplexing lowers diffraction limit
D)Lower intensity reduces photon antibunching

💡 Explanation

Temporal coherence averaging works because speckle patterns are uncorrelated in time across coherent sources; therefore random addition cancels the intensity variations, rather than worsening contrast as would happen with phase-locked interference.

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