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← ScienceWhich consequence results when imperfect coherence in laser cutting steel?
A)Increased thermal lensing in focusing optics
B)Kerf width variation along cut✓
C)Elevated risk of back reflection damage
D)Reduced plasma formation above workpiece
💡 Explanation
Kerf width varies along the laser cut because imperfect coherence causes variations in the intensity profile. This results in inconsistent material removal; therefore, kerf width changes rather than consistent cutting seen with high coherence because less precision in location then contributes to that variance.
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