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← ScienceWhich consequence results when injected dye lacking temporal coherence?
A)Increased signal-to-noise ratio obtained
B)Precise flow velocity measurement fails✓
C)Enhanced fluorescence lifetime observation
D)Improved stimulated emission pumping attained
💡 Explanation
Precise methods like Laser-Induced Fluorescence rely on temporal coherence for accurate measurement; *Doppler broadening* degrades fringes needed to gauge velocity, because light’s limited predictable phase sabotages correlation. Therefore, precise velocity measurement fails, rather than improved resolution, which coherence would enhance.
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