Negative phase velocity (NPV) is a property of light propagation in a medium. There are different definitions of NPV; the most common is Victor Veselago's ... Negative phase velocity · Negative refractive index

In a negative phase velocity medium, the phase velocity is directed opposite to the direction of energy flow (and attenuation). Other names in use:.

A zerogroup-velocity indicates a form of resonance with zero net power flow, and a negative group-velocity indicates a negative net energy velocity.

Definition. Negative phase velocity refers to the phenomenon where the phase of a wave travels in the opposite direction to its energy propagation.

This shows a wave with the group velocity and phase velocity going in different directions. The group velocity is positive, while the phase velocity is negative ... Group velocity · Refractive index · References

The purpose of this overview is to illuminate the background of rapidly occurring developments, to present a clear theoretical foundation of the involved ...

In isotropic lossless media, a negative phase velocity (a phase velocity which has a negative projection along the average Poynting vector) implies a negative ...

2 мар. 2020 г. · What does negative phase velocity and negative group velocity signify physically? Suppose we plot group velocity (V_g) and phase velocity (V_p) ...

The propagation of electromagnetic plane waves with negative phase velocity (NPV) is considered in Schwarzschild-(anti-)de Sitter spacetime.

Negative refraction is a wave phenomenon beyond geometrical optics - it depends on the way waves behave when their phase velocity reaches a zero.