1 февр. 1988 г. · It is shown that the group velocity can be larger than c without having any signal propagate faster than c.

7 мар. 2015 г. · The simple answer is that the wave packet travels at the group velocity not the phase velocity, and the group velocity is always less than or equal to c. Group and phase velocity - why can the latter be faster than light? What does phase velocity physically represent, and why can it ... Why the phase velocity of X-rays inside glass is faster than $c Другие результаты с сайта physics.stackexchange.com

29 сент. 2018 г. · …it is shown that the group velocity can be larger than c without having any signal prop. Continue Reading. Yes, it's possible. Group velocity ... Can phase velocity be faster than c? - Quora When particle velocity C is less than C, how is the de Broglie ... Can a material have a phase velocity greater than the vacuum ... How can the phase velocity of light be infinitely fast ... - Quora Другие результаты с сайта www.quora.com

The group velocity is positive (i.e., the envelope of the wave moves rightward), while the phase velocity is negative (i.e., the peaks and troughs move leftward) ...

22 нояб. 2023 г. · However, in case of anomalous dispersion, even the group velocity can become greater than c. ... These two will never be superluminal. Group Velocities > c for Anomalous Dispersion? : r/AskPhysics How can phase velocity exceed c and we still stipulate n>=1? How can the phase speed of a wave of light exceed C ... - Reddit What is phase velocity in a matter wave and how can it ... - Reddit Другие результаты с сайта www.reddit.com

It is shown that the group velocity can be larger than c without having any signal propagate faster than c.

For such packets, one can conclude un- ambiguously whether one velocity or the other is larger than or smaller than the speed of light c. It is also possible to ...

This does not break the rules of special relativity because information is transmitted at the group velocity, which is never greater than c. 12.7. Based on ...

27 янв. 2002 г. · Can the group velocity be greater than c? Although many textbooks say no, the answer is yes. In a previous column (Analog, December-1995), I ...