enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. 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.

  3. Electrophoretic light scattering - Wikipedia

    en.wikipedia.org/wiki/Electrophoretic_light...

    The frequency of light scattered by particles undergoing electrophoresis is shifted by the amount of the Doppler effect, from that of the incident light, :.The shift can be detected by means of heterodyne optics in which the scattering light is mixed with the reference light.

  4. 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.

  5. Dynamic light scattering - Wikipedia

    en.wikipedia.org/wiki/Dynamic_light_scattering

    Dynamic light scattering (DLS) is a technique in physics that can be used to determine the size distribution profile of small particles in suspension or polymers in solution. [1] In the scope of DLS, temporal fluctuations are usually analyzed using the intensity or photon autocorrelation function (also known as photon correlation spectroscopy ...

  6. Doppler broadening - Wikipedia

    en.wikipedia.org/wiki/Doppler_broadening

    A particular case is the thermal Doppler broadening due to the thermal motion of the particles. Then, the broadening depends only on the frequency of the spectral line, the mass of the emitting particles, and their temperature , and therefore can be used for inferring the temperature of an emitting (or absorbing) body being spectroscopically ...

  7. Spectral line shape - Wikipedia

    en.wikipedia.org/wiki/Spectral_line_shape

    As the excited state decays exponentially in time this effect produces a line with Lorentzian shape in terms of frequency (or wavenumber). Doppler broadening. This is caused by the fact that the velocity of atoms or molecules relative to the observer follows a Maxwell distribution, so the effect is dependent on temperature. If this were the ...

  8. Static light scattering - Wikipedia

    en.wikipedia.org/wiki/Static_light_scattering

    In these equations, the subscript A is for analyte (the solution) and T is for the toluene with the Rayleigh ratio of toluene, R T being 1.35×10 −5 cm −1 for a HeNe laser. As described above, the radius of gyration, R g, and the second virial coefficient, A 2, are also calculated from this equation.

  9. Black-body radiation - Wikipedia

    en.wikipedia.org/wiki/Black-body_radiation

    The relativistic Doppler effect causes a shift in the frequency f of light originating from a source that is moving in relation to the observer, so that the wave is observed to have frequency f': ′ = ⁡ /, where v is the velocity of the source in the observer's rest frame, θ is the angle between the velocity vector and the observer-source ...