A recent theoretical study of plane waves with orthogonal phase velocity is premised on incorrect assumptions. The conclusion reached therein - namely, that "a plane wave with orthogonal phase velocity cannot possess linear momentum" and therefore "cannot propagate at all" - is incorrect in general.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering