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← ScienceWhich effect is disrupted affecting digital holograms when laser coherence degrades?
A)Speckle contrast decreases noticeably✓
B)Chromatic aberration grows dominant
C)Signal-to-noise ratio decays gradually
D)Heat load on optics increases
💡 Explanation
Speckle contrast drops as temporal and spatial coherence lessen because fewer stable interference patterns exist, affecting overall constructive/destructive interference, resulting in poor or absent holographic contrast; therefore speckle decreases rather than chromatic issues that arise from wavelength mix or signal loss influenced by separate systematic errors.
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