Hi, Here you mention that "Phase Velocity can approach Infinity in a waveguide". And in another youtube lecture "Dispersion: Phase Velocity Versus Group Velocity, PHYS 372" by Stephen Remillard, it's mentioned that "Group Velocity can approach Infinity as well " (18:11, ua-cam.com/video/7oSpQy95b-E/v-deo.html). So Can I conclude that both Phase Velocity and Group Velocity can exceed the speed of light?
There is also energy velocity! LOL Phase velocity routinely exceeds the speed of light. In fact, I recently made a video about this for guided modes in a rectangular metal waveguide. ua-cam.com/video/jju9bjc067o/v-deo.htmlsi=CeQOqdf74hUg6Jqi I am aware that group velocity can also exceed the speed of light, but I am unaware of energy or information moving faster than the speed of light.
Wow, what a lecture. Fascinating topics.
It is a very cool topic!
an absolutely fantastic aid and teacher. thank you.
Thank you!
@@empossible1577 was very helpful with understanding key parts of slow light for my senior physics presentation thanks!
Thanks for your great lectures
Thank you!
Hi, Here you mention that "Phase Velocity can approach Infinity in a waveguide". And in another youtube lecture "Dispersion: Phase Velocity Versus Group Velocity, PHYS 372" by Stephen Remillard, it's mentioned that "Group Velocity can approach Infinity as well " (18:11, ua-cam.com/video/7oSpQy95b-E/v-deo.html). So Can I conclude that both Phase Velocity and Group Velocity can exceed the speed of light?
There is also energy velocity! LOL
Phase velocity routinely exceeds the speed of light. In fact, I recently made a video about this for guided modes in a rectangular metal waveguide.
ua-cam.com/video/jju9bjc067o/v-deo.htmlsi=CeQOqdf74hUg6Jqi
I am aware that group velocity can also exceed the speed of light, but I am unaware of energy or information moving faster than the speed of light.