A transition starting from a thermally populated vibrationally excited state. Its intensity depends on the lower-state population through the Boltzmann distribution. Anharmonicity and coupling between normal modes can shift it away from the corresponding vibrational fundamental.
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The term "hot band" can refer to different concepts depending on the context: 1. **Music**: In the music industry, a "hot band" typically refers to a musical group that is currently very popular or trending. These bands often receive a lot of media attention, sell out shows, and have a strong following. They could span various genres, including rock, pop, hip hop, and more.