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Which outcome occurs in digital holography when laser speckle reduces coherence?

A)Decreased fringe contrast during reconstruction
B)Increased sensor thermal noise floor
C)Accelerated image processing time overhead
D)Enhanced resolution beyond diffraction limit

💡 Explanation

Decreased fringe contrast results from lower coherence speckle because constructive and destructive interference patterns are less defined following the Van Cittert–Zernike theorem; therefore, image quality degrades, rather than increases in resolution or changes in noise, given a constant setup.

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