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Which effect limits the visibility of underwater objects when using LIDAR?

A)Decreased laser coherence length through water
B)Increased photon scattering in turbulent seawater
C)Chromatic aberration from salinity gradients
D)Reduced signal gain from thermal blooming

💡 Explanation

Decreased coherence causes signal degradation; specifically, the coherence length determines how far the beam propagates while maintaining phase, therefore blurring the reflected LIDAR signal and limiting effective range, because the laser quickly diffuses rather than imaging with a sharp reflection.

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