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← ScienceWhich challenge arises when directing a high-power laser through the atmosphere for long distances?
A)Reduced coherence limits focusability✓
B)Increased thermal lensing causes hotspots
C)Stimulated Raman Scattering weakens beam
D)Nonlinear absorption induces plasma formation
💡 Explanation
Atmospheric turbulence reduces coherence because varying refractive index introduces phase differences. This increased wavefront distortion limits how tightly it can be focused, therefore long-range power delivery becomes less efficient, rather than inducing nonlinear optical effects at that diminished focus.
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