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← ScienceWhich consequence results when differential path lengths exceed coherence length?
A)Reduced fringe contrast appears✓
B)Higher diffraction grating resolution
C)Increased laser power efficiency
D)Enhanced stimulated Raman scattering
💡 Explanation
Interference fringes lose contrast because the interfering waves are no longer coherent due to path length differences exceeding the source's coherence length. Therefore, fringe visibility diminishes rather than improving diffraction, efficiency, or stimulated scattering in the system.
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