One of the most difficult #friendlywaves I’ve ever gotten! Did I get it right?
Florian sent me a #friendlywave — a wave picture he took, with hopes that I might be able to explain what is going on there. And this one had me puzzled…
Tag: phase velocity
Christina’s #FriendlyWaves from Panama!
Christina writes on Twitter: “#wavewatching from a plane, approaching #Panama. @Meermini, do you know what causes those regular ‘wrinkles’?” and how could I resist writing a blog post about what…
Phase and group velocities in deep and shallow water
When Tor came to visit me in GFI’s basement lab a couple of days ago, he told me about an experiment he had seen in Gothenburg in the seventies. So…
Playing with roll wave animations
I love how powerful Powerpoint is, at the same time there surely is a way out there to create these kind of animations with a little less copy & pasting,…
Roll waves, one of the more complicated #friendlywaves I’ve gotten over the years…
#friendlywave is the new hashtag I am currently establishing. Send me your picture of waves, I will do my best to explain what’s going on there! When it rains, it pours,…
Why are they so much slower than I thought? Observing the group velocity vs phase velocity of waves
Have you ever seen a speedboat drive past, looked at its wake moving torwards you, then gotten distracted, and when you look back a little while later been surprised that…
Group velocity and phase velocity
When I recently wrote about observing waves in a different way, I talked about light being focussed by the waves on the sea floor. In the other post, I focussed…
Why waves propagate so slowly into smooth patches of water
The morning I went to Heligoland I spent some time in the port of Hamburg, trying to film a phenomenon I had recently chatted about with the author of this inspiring guest…
Signal velocity
How can a signal travel faster than the phase of a wave, or individual particles? I remember having a really hard time with the concept of a signal traveling faster…