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← ScienceWhich consequence results when increased path length difference degrades laser coherence?
A)Reduced interference fringe visibility✓
B)Increased energy conversion efficiency
C)Enhanced constructive interference only
D)Uniform diffraction pattern appears
💡 Explanation
Degraded laser coherence due to increased path length differences will diminish the temporal coherence, consequently impacting interference patterns. Therefore, fringe visibility declines because destructive interference becomes more pronounced rather than a uniform pattern arising.
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