translation.en: And so the fact that atoms, when you heat them up, only emit light at very specific colors, was one of the key drivers that led to the development of the quantum theory, the theory of the structure of atoms.
translation.zh: 当你加热原子时， 只会发出特定颜色的光， 原子的这一特性，成为 导向量子理论，原子结构理论发展的 一个关键因素。