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...

The relativistic Doppler effect is the change in frequency, wavelength and amplitude of light, caused by the relative motion of the source and the observer...

A Doppler radar is a specialized radar that uses the Doppler effect to produce velocity data about objects at a distance. It does this by bouncing a microwave...

known as the Doppler effect – that the observed frequency of a wave depends on the relative speed of the source and the observer. Doppler was born in Salzburg...

connecting them (longitudinal Doppler effect), and (2) the motions are at right angles to the said line (transverse Doppler effect). We are ignoring scenarios...

Doppler ultrasonography is medical ultrasonography that employs the Doppler effect to perform imaging of the movement of tissues and body fluids (usually...

physics, relativistic beaming (also known as Doppler beaming, Doppler boosting, or the headlight effect) is the process by which relativistic effects...

dilation, the relativistic velocity addition formula, the relativistic Doppler effect, relativistic mass, a universal speed limit, mass–energy equivalence...

relative motions of radiation sources, which give rise to the relativistic Doppler effect, and gravitational potentials, which gravitationally redshift escaping...

In atomic physics, Doppler broadening is broadening of spectral lines due to the Doppler effect caused by a distribution of velocities of atoms or molecules...

Δ v {\displaystyle \Delta v} that can be distinguished through the Doppler effect. Then, the resolution is Δ v {\displaystyle \Delta v} and the resolving...

A pulse-Doppler radar is a radar system that determines the range to a target using pulse-timing techniques, and uses the Doppler effect of the returned...

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...

systems use this principle into Doppler radar and pulse-Doppler radar systems (weather radar, military radar). The Doppler effect is only able to determine...

Robert Kirchhoff had first defined in 1859–1860." The relativistic Doppler effect causes a shift in the frequency f of light originating from a source...

A Doppler fetal monitor is a hand-held ultrasound transducer used to detect the fetal heartbeat for prenatal care. It uses the Doppler effect to provide...

way of avoiding acceleration effects is the use of the relativistic Doppler effect . Neither Einstein nor Langevin considered such results to be problematic:...

the Doppler shifted signal will become modulated. This additional Doppler effect causing the modulation of the signal is known as the micro-Doppler effect...

heart while the use of Doppler technology allows determination of the speed and direction of blood flow by utilizing the Doppler effect. An echocardiogram...

Laser Doppler velocimetry, also known as laser Doppler anemometry, is the technique of using the Doppler shift in a laser beam to measure the velocity...

bat approaches a target, its outgoing sounds return as echoes, which are Doppler-shifted upward in frequency. In certain species of bats, which produce...

used to measure water current velocities over a depth range using the Doppler effect of sound waves scattered back from particles within the water column...

The Differential Doppler effect occurs when light is emitted from a rotating source. In circumstellar environments it describes the difference in photons...

relativistic time dilation to the Doppler shift of light. The result was in agreement with the formula for the transverse Doppler effect and was the first direct...

failed due to energy being lost to recoil, preventing resonance (the Doppler effect also broadens the gamma-ray spectrum). Mössbauer was able to observe...

Look up Doppler in Wiktionary, the free dictionary. Doppler (Doppler effect or Doppler shift) is the frequency change of a wave for observer relative to...

with better accuracy in 1941. It was designed to test the transverse Doppler effect – the redshift of light from a moving source in a direction perpendicular...

transformation of the four-wavevector is one way to derive the relativistic Doppler effect. The Lorentz matrix is defined as Λ = ( γ − β γ   0     0   − β γ γ...

systems can distinguish chaff from legitimate targets by measuring the doppler effect; chaff quickly loses speed after leaving an aircraft, and the resulting...

detecting a change in frequency of the returned radar signal caused by the Doppler effect, whereby the frequency of the returned signal is increased in proportion...