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Doppler effect |
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Doppler effectChange in the observed frequency (or wavelength) of waves due to relative motion between the wave source and the observer. The Doppler effect is responsible for the perceived change in pitch of a siren as it approaches and then recedes, and for the red shift of light from distant galaxies. It is named after the Austrian physicist Christian Doppler. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| is a branch of spectroscopy in which a complete spectrum or some spectral information (such as the Doppler shift or Zeeman splitting of a spectral line) is collected at every location in an image plane. At time t the magnitude square of the output of a filter matched to a zero delay and a zero Doppler shift is This technique, known as the wobble or Doppler shift method, reveals only the minimum mass of a planet. |
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