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  2. Relativistic Doppler effect - Wikipedia

    en.wikipedia.org/wiki/Relativistic_Doppler_effect

    The relativistic Doppler effect is the change in frequency, wavelength and amplitude [1] of light, caused by the relative motion of the source and the observer (as in the classical Doppler effect, first proposed by Christian Doppler in 1842 [2]), when taking into account effects described by the special theory of relativity.

  3. Doppler effect - Wikipedia

    en.wikipedia.org/wiki/Doppler_effect

    [1] [2] [3] The Doppler effect is named after the physicist Christian Doppler, who described the phenomenon in 1842. A common example of Doppler shift is the change of pitch heard when a vehicle sounding a horn approaches and recedes from an observer. Compared to the emitted frequency, the received frequency is higher during the approach ...

  4. Relativistic beaming - Wikipedia

    en.wikipedia.org/wiki/Relativistic_beaming

    Only a single jet is visible in M87. Two jets are visible in 3C 31.. In physics, relativistic beaming (also known as Doppler beaming, Doppler boosting, or the headlight effect) is the process by which relativistic effects modify the apparent luminosity of emitting matter that is moving at speeds close to the speed of light.

  5. On the coloured light of the binary stars and some other ...

    en.wikipedia.org/wiki/On_the_coloured_light_of...

    Front cover Albireo, a well-known coloured double star.Compare the colour of other stars in . On the coloured light of the binary stars and some other stars of the heavens or in the original German Über das farbige Licht der Doppelsterne und einiger anderer Gestirne des Himmels is a treatise by Christian Doppler (1842) [1] in which he postulated his principle that the observed frequency ...

  6. Twin paradox - Wikipedia

    en.wikipedia.org/wiki/Twin_paradox

    This combines the effects of time dilation due to motion (by factor ε = 0.6, five years on Earth are 3 years on ship) and the effect of increasing light-time-delay (which grows from 0 to 4 years). Of course, the observed frequency of the transmission is also 1 ⁄ 3 the frequency of the transmitter (a reduction in frequency; "red-shifted").

  7. Ives–Stilwell experiment - Wikipedia

    en.wikipedia.org/wiki/Ives–Stilwell_experiment

    In physics, the Ives–Stilwell experiment tested the contribution of relativistic time dilation to the Doppler shift of light. [1] [2] The result was in agreement with the formula for the transverse Doppler effect and was the first direct, quantitative confirmation of the time dilation factor. Since then many Ives–Stilwell type experiments ...

  8. Black-body radiation - Wikipedia

    en.wikipedia.org/wiki/Black-body_radiation

    The relativistic Doppler effect causes a shift in the frequency f of light originating from a source that is moving in relation to the observer, so that the wave is observed to have frequency f': ′ = ⁡ /, where v is the velocity of the source in the observer's rest frame, θ is the angle between the velocity vector and the observer-source ...

  9. Category:Doppler effects - Wikipedia

    en.wikipedia.org/wiki/Category:Doppler_effects

    Differential Doppler effect; Doppler broadening; Doppler cooling; Doppler imaging; ... On the coloured light of the binary stars and some other stars of the heavens; V.