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← ScienceWhich consequence results when differential path lengths exceed coherence length in LiDAR?
A)Speckle noise reduction occurs
B)Increased side-lobe clutter appears
C)Interference fringes cease forming✓
D)Reflected power readings decrease
💡 Explanation
When path length differences surpass laser coherence length, constructive and destructive interference patterns break down because the light waves are no longer correlated. Therefore fringes disappear, rather than reduced noise, because correlation is required for LiDAR interference.
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