Light Doppler effect

Frequency difference between scattered and incident light ... 

Doppler spectroscopy spect A technique for measuring the speed with which an object is moving toward or away from the observer by measuring the amount that light from the object is shifted to a higher or lower frequency by the Doppler effect. dap-l3r spek tras-ko-pe)... 

The spectrum of light, scattered from a gas is determined by the motion of the scatterers (Doppler effect) and by collisions and can therefore yield information about collision cross-sections 245). jhe analytical expressions connecting theory and experimental results are given in ref. 245 a)... 

Doppler effect freqnency shift between emitted and received light due to the... 

Doppler Effect (or Principle) and Its Application for Military Purposes. The Doppler (or more correctly Doppler) effect, first observed by C.J. D oppler of Prague in 1842, involves the apparent change in the frequency of light, sound, or electromagnetic waves observed while the source and the observation point are in motion relative to each other. The effect is commonly ob-... 

In most optical excitations the resolution is determined by the Doppler effect or the finite linewidth of the light source. The Doppler effect gives a typical frequency width of 1 GHz, and the width of the light source can be anywhere from 1 kHz to 30 GHz. We assume that these widths are larger than the radiative width. The photoionization cross sections from the ground states of H, alkali, and the alkaline earth atoms are given in Table 3.3. 20... 

When a spherical particle enters the crossing volume of two laser beams, a Doppler effect occurs not only in frequency shift but also in phase shift of the scattered light. The frequency shift yields the velocity of the sphere, whereas the phase shift gives the particle size. The phase Doppler principle has been employed to measure the size and size distributions of spheres in addition to the particle velocity. The phase Doppler principle was first reported by Durst and Zare (1975) and became a viable measurement tool one decade later [Bachalo and Houser, 1984]. 

Sir, I have studied the Doppler effect. The change in wavelength AX divided by the wavelength from a stationary source (X) equals the space velocity (relative velocity) v divided by the speed of light c. ... 

Fig. 10. Extrapolation of the half maximum center (o) and of the line position corrected for the light-shift, second order Doppler effect and 8D hyperfine structure ( ) versus the light power P in the case of the 2 >i/2 (F = 1) — 8D5/0 transition of deuterium...

Dynamic light scattering (DLS), also called photon correlation spectroscopy (PCS) or laser light scattering (LLS) is a technique based on the principle that moving objects cause a frequency shift due to the Doppler effect. If a solution of macromolecules with random Brownian motion is illuminated with monochromatic laser light, the scattered light should contain a distribution of frequencies about the incident frequency the spectral line is virtually broadened. The width of the distribution is related to the MMD. 

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