Doppler shift

(noun)

is the change in frequency of a wave for an observer moving relative to its source.

Related Terms

  • Thomson scattering
  • inelastic scattering

Examples of Doppler shift in the following topics:

  • The Compton Effect

    • The amount of change in the wavelength is called the Compton shift.
    • Thomson scattering, the classical theory of an electromagnetic wave scattered by charged particles, cannot explain low intensity shifts in wavelength: classically, light of sufficient intensity for the electric field to accelerate a charged particle to a relativistic speed will cause radiation-pressure recoil and an associated Doppler shift of the scattered light.
  • Turbulence Explained

    • Another method of detecting this type of turbulence is ultrasound, used as a medical indicator in a process analogous to Doppler-shift radar (used to detect storms).
  • Microwaves

    • A Doppler shift in the radar echo can determine the speed of a car or the intensity of a rainstorm.
  • The Michelson Interferometer

    • It has played an important role in studies of the upper atmosphere, revealing temperatures and winds (employing both space-borne and ground-based instruments) by measuring the Doppler widths and shifts in the spectra of airglow and aurora.
  • Line Broadening Mechanisms

    • In all but the last of these examples the energy of the photon is shifted due to the Doppler effect.
  • The Doppler Effect

    • The Doppler Effect is the change in a wave's perceived frequency that results from the source's motion, the observer, and the medium.
    • The Doppler effect is a periodic event's change in frequency for an observer in motion relative to the event's source.
    • Most people have experienced the Doppler effect in action.
    • The Doppler effect can be caused by any kind of motion.
    • If the observer moves relative to the stationary siren, the observer will notice the Doppler effect on the pitch of the siren.
  • Doppler Effect

  • Moving Observer

    • The Doppler effect is the apparent change in frequency of a wave when the observer and the source of the wave move relative to each other.
    • In this atom, we are going to cover the Doppler effect , but specifically when the observer is the one in motion.
    • The first video describes the basics of sound while the second video looks at the Doppler Effect.
  • Moving Source

    • The Doppler effect is the apparent change in frequency of a wave when the observer and the source of the wave move relative to each other.
    • This Doppler Effect is illustrated in .
  • General Case

    • The Doppler effect is the apparent change in frequency of a wave when the observer and the source of the wave move relative to each other.
    • The name of this is called the Doppler effect, named for the scientist who discovered it.
    • His name was Christian Doppler, and he discovered it around 1840 in Prague.
    • Compare change in the frequency due to the doppler effect when the object in motion moves towards or away from the other object
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