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What is Laser about?
The document discusses the concept of coherence in light waves, explaining that coherent waves have a constant phase difference, which is essential for observable interference patterns. It also covers the purity of spectral lines, temporal and spatial coherence, and the processes of spontaneous and stimulated emissions in atomic systems, emphasizing the significance of population inversion for laser action. Additionally, it introduces Einstein
- Author
- income1597
- Language
- EN