This is true : a plane wave is really a spherical wave of infinite radius.
12.
Each atom re-radiates a small portion of an incoming beam's intensity as a spherical wave.
13.
It can be seen that every node turns into a secondary source of spherical wave.
14.
This Fourier transform is scaled by the amplitude of the spherical wave, which has dimensions of length.
15.
Interference of spherical waves is usually not combined with ray tracing, thus diffraction at an aperture cannot be calculated.
16.
The parabolic reflector transforms an incoming plane wave traveling along the axis into a spherical wave converging toward the focus.
17.
So a spherical wave in one frame remains spherical in another one, which is often used to derive the Lorentz transformation.
18.
The physicists used a special device known as a low-energy electron point source microscope that creates a spherical wave of electrons.
19.
The spherical Hankel functions appear in problems involving spherical wave propagation, for example in the multipole expansion of the electromagnetic field.
20.
That is, a uniformly-illuminated circular aperture that passes a converging uniform spherical wave yields an Airy function image at the focal plane.
