Which impairment occurs to holograms lacking illumination coherence?

A)Speckle noise increases significantly✓

B)Color fidelity is permanently reduced

C)Diffraction efficiency becomes minimal

D)Overall brightness intensifies slightly

💡 Explanation

Increased speckle noise happens because spatial coherence correlates directly to speckle contrast through complex amplitude sum. Therefore, less coherence causes greater phase variations and higher speckle contrast, rather than color change or brightness shift under stable illumination.

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Which impairment occurs to holograms lacking illumination coherence?

💡 Explanation

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