Note that the term " far field " usually means we're talking about a converging or diverging spherical wave with a pretty well defined phase center.
32.
Conversely, a spherical wave generated by a point source placed in the focus is reflected into a plane wave propagating as a collimated beam along the axis.
33.
As a spherical wave expands, the fixed energy of the wave must spread out over an expanding sphere of surface area 4 \ pi r ^ 2.
34.
When a surface is illuminated by a light wave, according to diffraction theory, each point on an illuminated surface acts as a source of secondary spherical waves.
35.
The total scattering intensity in GED is given as a interference of the scattering spherical waves generated by the scattering from the atoms included in the target molecule.
36.
Where " F " and " G " are general solutions to the one-dimensional wave equation, and can be interpreted as respectively an outgoing or incoming spherical wave.
37.
In the " Spherical Wave Proof " article, the author comes up with this " Condition 2 " that all points on the sphere must have the same radius.
38.
It deals with wave fronts and their normal rays, with propagation conceived by means of spherical waves emitted along the wave front ( see also Huygens Fresnel principle ).
39.
It is found by transforming the spherical wave along the in-plane coordinates ( x, y, or \ rho, \ phi ) but not transforming along the height coordinate z.
40.
Just as an ocean wave striking a lighthouse produces secondary circular waves emanating from the lighthouse, so an X-ray striking an electron produces secondary spherical waves emanating from the electron.
