In this deep-water case, the phase velocity is twice the group velocity. The red square overtakes two green circles when moving from the left to the right of ...

2 апр. 2022 г. · It is true (in general) that for dispersive mediums like glass, the group velocity is usually smaller than the phase velocity. Phase velocity greater then the speed of light? Group and phase velocity - why can the latter be faster than light? What does phase velocity physically represent, and why can it ... Does phase velocity or group velocity change when light enters ... Другие результаты с сайта physics.stackexchange.com

The group velocity is positive, while the phase velocity is negative. Group velocity · Refractive index · References

For most substances, therefore, the group velocity is smaller than the phase velocity. In some unusual circumstances or special materials, it may be possible ...

10 сент. 2019 г. · The group velocity is the velocity of the wave with lower frequency, but the phase velocity is the velocity of the wave with higher frequency. Can group velocity be faster than the speed of light? - Quora Can phase velocity be faster than c? - Quora Can a material have a phase velocity greater than the vacuum ... What is the physical significance of phase velocity greater than ... Другие результаты с сайта www.quora.com

2 окт. 2023 г. · And since no one has pointed it out yet - you can have a group velocity that is faster than phase velocity in special materials that have ...

In this case, the superposed wave's group veloicty Vg is larger than its phase velocity Vp. Again, this is best shown in the following animation.

... phase velocity can be greater than the group velocity. In the case of electromagnetic waves the phase velocity can be greater than c = 3 × 109 m/s, the ...

4 янв. 2019 г. · The group velocity can also be greater than c under certain circumstances, but it doesn't allow for FTL communication. The "signal velocity" is ...