Which risk increases during laser cutting when reactive fumes contaminate the lens?

💡 Explanation

Contamination enables absorption; this occurs because reactive species deposit and undergo photochemical reactions. This decreases the transmissive efficiency via **non-linear absorption**, therefore causing lens overheating, rather than dimensional changes or minor material defects, due to localized thermal runaway.

• Which mechanism causes increased brittleness in polymers undergoing chain scission due to UV radiation?
• Which consequence results when boundary layer transition occurs in subsonic flow?
• Which acoustic phenomenon causes destructive interference in noise-canceling headphones?
• Which consequence results when strong external magnetic fields reduce polarization?
• Which mechanism limits the effective range of an optical fiber signal propagation?
• Which molecular consequence arises in Teflon during high-energy electron irradiation?