Which consequence results when a laser engraver's beam defocuses?

💡 Explanation

Increased thermal stress occurs upon defocusing, because the lowered energy density causes slower material removal. The thermal conduction mechanism heats a larger volume; therefore stress concentrates rather than ablating perfectly, rather than increasing speed.

• Which outcome occurs when microwave radiation incidents on a metallic screen with subwavelength apertures?
• Which phenomenon reduces the efficiency of gallium arsenide (GaAs) solar cells when subjected to high electron density at grain boundaries?
• Which outcome results from excessive optical pumping in polarizing filters?
• Which risk increases when a Faraday cage's mesh spacing exceeds the wavelength of incident electromagnetic fields?
• Which outcome results when turbulence overwhelms a boundary layer?
• Which consequence results when energy increases within a black hole?