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← ScienceWhich outcome occurs when a pulsed laser induces thermal expansion unevenly?
A)Material surface acoustic wave formation✓
B)Increased stimulated emission efficiency
C)Shift in the optical gain medium
D)Reduction pump cavity losses
💡 Explanation
The uneven heating causes rapid localized expansion, initiating thermoelastic effects promoting surface acoustic waves because the laser impacts specific volume regions; therefore, shockwaves initiate rather than uniform heating because wave propagation depends on the intensity gradient distribution.
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