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← ScienceWhich risk increases when a laser's coherence length degrades?
A)Speckle contrast in imaging increases✓
B)Pulse duration after compression decreases
C)Material ablation thresholds become lower
D)Chromatic dispersion effects are minimized
💡 Explanation
Speckle contrast increases because shorter coherence length means light from different parts of the sample interferes less predictably via constructive & destructive interference, therefore speckle contrast rises, rather than other listed outcomes that favor increased coherence.
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