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 risk increases when an amorphous solid undergoes devitrification from increased temperature?
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• Which outcome is observed when one photon in an entangled pair undergoes polarization measurement?
• Which risk increases within a gas-filled radiation detector when the fill gas’ purity diminishes?
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