Doppler Effect is the increase or decrease in light, sound or other waves when the source and observer move towards or away from each other. This effect gives rise to not just a crucial theory of physics but also helps in mathematical calculation of waves and their frequencies. Before proceedi...
A detailed account is presented of the Doppler effect as a photon phenomenon, complementing a recent paper by Giuliani (2013 Eur. J. Phys. 34 1035-47). The essence of Schrodinger's pioneering derivation (1922 Phys. Z. 23 301-3) of a Doppler formula in terms of the corpuscular theory ...
When I recall the derivation of Doppler shift, I see that we write equation of wave (say a plane wave) in () and () frame. Then we apply lorentz transformation in the wave equation of primed frame and finally equate the coefficients to get the relation of frequencies. The basic ...
In addition to a derivation of exact formulae for the spectra, we give an explanation with the help of an appropriate set of dressed atomic states. We also get a deeper insight into the physical origin of gain in view of the existence of a population inversion between the levels of the ...
We choose to estimate the parameter μ instead of v, as it naturally arises in the Doppler effect. The estimation error of v is related to the one of μ via the error propagation formula for the QFI \(J(v)={({\partial }_{v}\mu (v))}^{2}J(\mu (v))\). The Fourier ...
v = fd(η) �ϕ(η)π (4) Enhancing the correlation between azimuth and Doppler frequency via 2D rotational invariance The following derivation demonstrates the principle of using rotational invariance to further enhance the cor- relation between azimuth and Doppler frequency. The geometric model...
The Doppler Effect for Sound in a Moving Medium An alternate derivation of the Bateman formula for Doppler's principle is described. A method is given for the evaluation of the direction cosines which ap... RW Young - 《Journal of the Acoustical Society of America》 被引量: 4发表: 1934年...
To determine the effect of the radar operating frequency, f, on the observed Doppler shift, consider a simplified model of the ionosphere which neglects the effect of the Earth’s magnetic field (justified by the derivation above). In such a model, the refractive index for the ionosphere beco...
The derivation of the signals I1, Q1and I2, Q2shown in FIG. 6 will be described hereinafter, the operations being affected using single frequencies instead of frequency bands in order to simplify the representation. The received double side band signal is described by:fe(t)=4.[cos (ω0+...
A Pedagogical Note on the Doppler-Effect Formulas.Presents a method for the derivation of the Doppler-effect formulas. How the formula can be obtained; Advantages and disadvantages of the method presented.DibbleWilliamE.Physics Teacher