Doppler Effect
... • Examples: star approaches an observer so its light appears at higher frequency (blue shift). • Examples: Galaxies are accelerating away from observer so their light appears at lower frequencies (red shift). • Examples: Police use radar gun (radio waves) to monitor speed of cars and trucks. ...
... • Examples: star approaches an observer so its light appears at higher frequency (blue shift). • Examples: Galaxies are accelerating away from observer so their light appears at lower frequencies (red shift). • Examples: Police use radar gun (radio waves) to monitor speed of cars and trucks. ...
Einstein Postulates for Special Relativity
... determined either receding, directly away from us, or approaching, directly toward us, by measuring the Doppler shift of the light that reaches the Earth. Suppose a star moves away from us with a radial speed v that is low enough so that is small enough for us to neglect 2 terms or ...
... determined either receding, directly away from us, or approaching, directly toward us, by measuring the Doppler shift of the light that reaches the Earth. Suppose a star moves away from us with a radial speed v that is low enough so that is small enough for us to neglect 2 terms or ...
Relativistic Doppler effect
The relativistic Doppler effect is the change in frequency (and wavelength) of light, caused by the relative motion of the source and the observer (as in the classical Doppler effect), when taking into account effects described by the special theory of relativity.The relativistic Doppler effect is different from the non-relativistic Doppler effect as the equations include the time dilation effect of special relativity and do not involve the medium of propagation as a reference point. They describe the total difference in observed frequencies and possess the required Lorentz symmetry.