Which risk increases when spatial coherence degrades within a laser?

💡 Explanation

Increased beam divergence results from degraded coherence, because the lack of phase correlation increases the beam spread through diffraction effects. Therefore, focusability decreases, rather than higher efficiency or mode-locking, since those are effects independent of coherence.

• Which outcome occurs by constructive interference between radio waves?
• Which filtering outcome occurs when initially unpolarized light travels through two polarizers with a 90-degree angular offset?
• Which outcome occurs when a reactor uses uranium isotopes enriched beyond criticality limits?
• Which outcome occurs when hydraulic fluid viscosity decreases within machinery?
• Which bonding change occurs when UV radiation excites formaldehyde?
• Which outcome occurs when rapidly compressing an orthorhombic crystal?