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  2. Doppler effect - Wikipedia

    en.wikipedia.org/wiki/Doppler_effect

    The Doppler effect (also Doppler shift) is the change in the frequency of a wave in relation to an observer who is moving relative to the source of the wave. [ 1 ] [ 2 ] [ 3 ] The Doppler effect is named after the physicist Christian Doppler , who described the phenomenon in 1842.

  3. 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.

  4. Redshift - Wikipedia

    en.wikipedia.org/wiki/Redshift

    If a source of the light is moving away from an observer, then redshift (z > 0) occurs; if the source moves towards the observer, then blueshift (z < 0) occurs. This is true for all electromagnetic waves and is explained by the Doppler effect. Consequently, this type of redshift is called the Doppler redshift.

  5. Time dilation - Wikipedia

    en.wikipedia.org/wiki/Time_dilation

    When unspecified, "time dilation" usually refers to the effect due to velocity. After compensating for varying signal delays resulting from the changing distance between an observer and a moving clock (i.e. Doppler effect), the observer will measure the moving clock as ticking more slowly than a clock at rest in the observer's own reference frame.

  6. Gravitational redshift - Wikipedia

    en.wikipedia.org/wiki/Gravitational_redshift

    Gravitational redshift can be interpreted as a consequence of the equivalence principle (that gravity and acceleration are equivalent and the redshift is caused by the Doppler effect) [5] or as a consequence of the mass–energy equivalence and conservation of energy ('falling' photons gain energy), [6] [7] though there are numerous subtleties ...

  7. How does Doppler radar work? Is it accurate? Here’s what to ...

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  8. 63 Times Pet Owners Set A “Trap” To Catch Their Cats And It ...

    www.aol.com/63-times-pet-owners-set-072646710.html

    Pet cats have their own little quirks, one being the ability to slip into the most unusual places around the house. Before you know it, you’re finding your furry feline friend balled up in a ...

  9. The College Football Playoff committee must answer five ...

    www.aol.com/college-football-playoff-committee...

    The third College Football Playoff rankings will be released Tuesday with some major questions looming for the committee to answer.