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← ScienceWhich limitation occurs in long-range LIDAR systems using atmospheric backscatter?
A)Speckle noise reduces image contrast✓
B)Raman scattering distorts Doppler shifts
C)Fresnel diffraction limits resolution
D)Mie scattering saturates photoreceptors
💡 Explanation
Speckle noise arises from the interference of coherent light, which degrades image quality because atmospheric turbulence affects the wavefront to change phase randomly leading to grainy patterns. Therefore, speckle reduction is crucial, rather than Raman/Mie shifts or diffraction effects which are secondary in a LIDAR system affected by atmospheric backscatter during operation.
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