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Which consequence results when injected free-electron laser pulse coherence degrades?

A)Decreased spectral brightness of emitted photons
B)Increased efficiency of electron acceleration
C)Improved spatial resolution in imaging
D)Enhanced energy spread minimization observed downstream

💡 Explanation

Decreased spectral brightness happens because degraded coherence reduces constructive interference among photons during light emission; therefore, emitted frequency intensity weakens rather than increases, and imaging resolution degrades.

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