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← ScienceWhich outcome results in holographic data storage when beam coherence declines?
A)Diffraction efficiency markedly decreases✓
B)Writing speed becomes inherently faster
C)Recorded holograms abruptly self-erase
D)Spatial resolution vastly improves
💡 Explanation
Beam coherence in holographic storage relies on constructive interference; decreased coherence reduces interference via wavefront mixing. Therefore, diffraction efficiency drops because of degraded fringe contrast, rather than faster writing or improved resolution which need high coherence.
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