This generates a spherical electron wave with the excited atom as the center.

Indeed there is no evidence of an ether which underlies the electron wave.

See the article on electromagnetic electron waves for more detail.

This approach essentially confined the electron wave in one dimension, along a circular orbit.

Instead, contrast arises from the interference in the image plane of the electron wave with itself.

First however, both phase and amplitude of the electron wave in the image plane must be measured.

The electron waves vanish if the microscope is switched off.

Typically, a metallic structure with spatial variations that are about the same size as the electron wave is used.

We have not yet discovered the general dynamic equation for the evolution of electron waves.

Since it works through the manipulation of electron waves, it can also be used to influence machines.