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← ScienceWhich consequence results when excessively pulsed laser ablates PMMA?
A)Increased surface roughness forms✓
B)Decreased ablation efficiency occurs
C)Uniform material removal results
D)Reduced heat affected zone appears
💡 Explanation
Increased roughness results because plasma formation during pulsed laser ablation exceeds the polymer's damage threshold; therefore, irregular bursts cause localized, non-uniform etching rather than controlled material vaporization because the material properties change with excessive energy.
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