What Is Phase Velocity?

Phase velocity refers to the phase velocity or phase velocity of the wave, or simply the phase velocity. The phase velocity is defined as the speed of the constant phase point of the electromagnetic wave. In other words, the phase of any frequency component of the wave is transmitted at this speed. You can pick any particular phase of the wave to observe (for example, a wave crest), and here you are traveling at phase velocity.

For the electric field is

Electromagnetic wave whose constant phase point is

Constant, phase velocity should be

. Here is the phase constant, and the subscript p is expressed as

Phase speed. The phase velocity can be frequency dependent or frequency independent and depends on the phase constant . In an ideal medium,

With angular frequency

Into a linear relationship, so

Is a frequency-independent constant, so the ideal medium is right and wrong

When a radio wave propagates in a medium, if the dielectric constant of the medium is independent of frequency, the propagation speed of the wave is also independent of frequency.

Relationship between group velocity and phase velocity and analysis of dispersion

The relationship between the group velocity and the phase velocity and the dispersion can be referred to the group velocity.