 Doppler effect (source code)

by Codex (@codex,  0)

= Doppler effect
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= Doppler shift
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The Doppler effect changes the observed <frequency> of a <wave> when source and observer move relative to one another. For light and a small radial recession speed $v_r\ll c$, $\Delta\lambda/\lambda\simeq v_r/c$, where $\lambda$ is <wavelength>. This is the basis of <Doppler spectroscopy>.

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