resonance absorption

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resonance absorption

physics

Learn about this topic in these articles:

electromagnetic radiation

In electromagnetic radiation: Resonance absorption and recoil
During the mid-1800s the German physicist Gustav Robert Kirchhoff observed that atoms and molecules emit and absorb electromagnetic radiation at characteristic frequencies and that the emission and absorption frequencies are the same for
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saturation spectroscopy

In spectroscopy: Techniques for obtaining Doppler-free spectra
Thus, the absorption resonance of the atoms, without broadening from the Doppler effect, can be observed. Figure 1C shows the same hydrogen spectra taken with saturation spectroscopy.
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