doppler effect

Examples of doppler effect in the following topics:

• 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.
  • While the frequency will change whether the observer or sound source is moving, the effect is more easily demonstrated by the sound source.
  • 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

• Sonic Booms

  • It can be viewed as a Doppler effect on steroids; sonic booms generate an enormous amount of energy, and sound like explosions.
  • This version of a Doppler effect is demonstrated by .

• Line Broadening Mechanisms

  • In all but the last of these examples the energy of the photon is shifted due to the Doppler effect.
  • Both of these effects result in a Lorentz profile for the line of the form

• Momentum Transfer and Radiation Pressure Atom

  • In laser cooling (sometimes called Doppler cooling), the frequency of light is tuned slightly below an electronic transition in the atom.
  • Because light is detuned to the "red" (i.e., at lower frequency) of the transition, the atoms will absorb more photons if they move towards the light source, due to the Doppler effect.

• The Compton Effect

  • The Compton Effect is the phenomenon of the decrease in energy of photon when scattered by a free charged particle.
  • Still, the origin of the effect can be considered as an elastic collision between a photon and an electron.
  • However, the effect will become arbitrarily small at sufficiently low light intensities regardless of wavelength.
  • The Compton Effect is the name given to the scattering of a photon by an electron.
  • Studying this effect, Compton verified that photons have momentum.

• 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).
  • The mixing currents in oceans creates a similar effect.