日常生活中的科学
Why is the sky blue?
If wave speed is fixed, doubling frequency halves wavelength because v = fλ.
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简短答案
If wave speed is fixed, doubling frequency halves wavelength because v = fλ.
真正发生了什么？
光谱学研究物质如何随波长、频率或能量发射、吸收和散射电磁辐射。离散谱线与原子能级结构直接相关，而分子光谱还会反映振动和转动自由度。
光谱学研究物质如何随波长、频率或能量发射、吸收和散射电磁辐射。离散谱线与原子能级结构直接相关，而分子光谱还会反映振动和转动自由度。
Hydrogen emits discrete spectral lines because electrons change between quantized energy states.
一个有用的直观图景
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Visible light interacts with molecules in the atmosphere. Shorter visible wavelengths are scattered more strongly, which is why the daytime sky usually looks blue.