Explain the role of resonant cavity in determining the coherence and m

Question

Explain the role of resonant cavity in determining the coherence and monochromaticity of a laser light.

23 Apr 2024

Answer :

Word Count : 407

A resonant cavity, or optical cavity, plays a crucial role in determining the coherence and monochromaticity of laser light. It consists of two or more mirrors facing each other, forming a closed loop that allows light to circulate multiple times through the laser medium.

### Coherence

**Spatial Coherence:**
The resonant cavity ensures that the light waves traveling back and forth between the mirrors remain in phase. This phase alignment is crucial for spatial coherence, which means that the light waves ___ _______ ______ ______ __________ __________ ______ _______ ___ ___ __________ _____.
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