Wave watching in a bucket
On the GEOF105 student cruise that I was lucky enough to join like I did last year, I happened to observe what you see in the picture above: Standing waves…
Tag: interference
Bergen harbour wave watching
Oh look, someone built a perfect rectangular wave watching basin into Bergen harbour! As you see above, waves are propagating towards this little wave tank and into it. They then…
Strong gusts of wind -> lots of energy transferred to the water -> wind waves with large amplitudes
We are still in the “interesting weather” period here in Kiel. Feels more like April than like September, but I am not complaining. I love the rapid change between dark…
April weather in September (Great for #WaveWatching and cloud watching!)
Minutes after drawing the illustration to the “you are not a drop in the ocean, you are the ocean in a drop” quote I shared yesterday in the most beautiful…
Concave sea wall focuses waves into interesting pattern
Early morning Kiel fjord — today even featuring a hot-air balloon! But, more interestingly, the wake of this police boat. I find it already pretty cool in the picture below:…
Fantastic wave and current watching at Piel Island
We saw Piel Island with a very cool castle ruin across the bay when visiting the South Walney Nature Reserve the other day, and were intrigued by it. Depending on…
Astrid sent me a #friendlywaves from Whitstable for remote #wavewatching
Astrid, #wavewatching supporter from Day 1, sent me these pictures for a #friendlywaves post. Today, I want to start with a spoiler picture (or, rather, I did start with a…
A #friendlywaves from Tampa, Florida
Anyone who might be new to my blog because of yesterday’s presentation at #SiPManc — please don’t be scared and run away, this is the most complicated #friendlywaves I have…
Intriguing interference pattern of waves
Do you see those weird traces going away from us, perpendicular to the wave crests, but in parallel to the bright stripes on the sea floor (I talked about those…
Wave watching by proxy — looking at how waves focus light on the sea floor
What is it that we actually look at when we go wave watching? Water is pretty much clear (or at least it is in the spots where I like to…
Forget about big waves, today we are focussing on the details!
Today we are focussing on tiny waves right near the shore inside the sheltered harbor. See how below there are two wave fields, one with longer waves with crests that…
Ferry sailed past, wake perpendicular to wind. Cool interference pattern!
Guess the title says it all today ;-) Just kidding. Below you see a movie of a neat interference pattern I observed this morning. The situation is similar to yesterday in…
Experiment: Interference of waves
Interference of waves is something often taught either using light as a practical example, or without a practical example. Here I want to show a couple of observations as well…
Awesome interference pattern in a Norwegian fjord
“Hei Mirjam. Bergen had it’s two days of allocated summer during the weekend of 22 – 23 July 2017 and Elsa and I decided to – in true Norwegian style…
Expedition learning
Last week, we ran an “expedition learning” course for 17-year olds. They were separated into several groups, working on different topics, and mine (unsurprisingly) worked on waves. You can see…
Weekend wave-watching
Of course I did not only take pictures of lighthouses and instructional activities during the teacher training at Lotseninsel last week. I also took TONS of pictures of water! Some…
Reflected wakes
When a ship has sailed past, at first you see only its wake. And then you see reflected bow waves interfering with the original wave pattern: See?
Waves reflecting on a sea wall
I really like it when waves reach a sea wall at an angle, because the resulting criss-cross looks so cool :-) And especially cool when you see it gradually building…
Expedition learning
In July I will be involved in teaching an “expedition learning” course for a week. It will be all about coastal protection in the Kiel region, so two colleagues and…
More funny waves
I think I might need to find a new route to walk along the Kiel fjord. When I was walking — in the most beautiful sunshine! — with my friend…
Nonlinear effects in shallow water waves
I recently googled for something related to the shape of waves and came across a photo of a wave that caught my eye, and it took me to a journey that…
Interference of one wave field with its reflection and a second wave field
All you regular readers of my book and my blog surely recognize what’s going on below? Yes! A wave field comes in at an angle to the pier and gets…
Wave-watching
Do you know the feeling when you, even on the most beautiful of days, want to get out of the pretty parks as quickly as possible so you can finally…
Wavelength dependency of wave-object-interactions
Wavelength dependency of wave-object-interactions. What a title! :-) But that is exactly what I observed over the enormous timespan of three full minutes (as shown by the time stamps of…
If waves spread equally in all directions, then how come we see linear wakes?
If waves spread equally in each direction along the water’s surface, then how come ships (or ducks) have wakes that are just those long lines of waves and not circular at…
Wave hunt expedition. You don’t need to live close to the coast to observe all kinds of wave phenomena!
A 1.5 hour walk around a lake — and 242 photos of said lake — later I can tell you one thing: You definitely don’t need to live close to…
Observing hydrodynamic phenomena on a creek
Looking at a creek on a Sunday stroll, and seeing lots and lots of concepts from hydrodynamics class. For example below, you see waves radiating from each of the ducks. And…
Interference of waves
The advantage of wind-less days on a sailing holiday is that you can play with water as much as you like. For example in order to look at the interference…
More interference of waves, this time as seen “at sea”
“At sea” in quotes, because technically we were at the mouth of the Weser river… But still! (deutscher Text unten) The really exciting thing working with the kids here at…
Wave interference in a tank
Creating waves and watching them interfere. (deutscher Text unten) You might not have guessed it from reading about our waves meeting over a sandbank experiment, but we weren’t doing in…
Interference of waves.
Movie on wave interference – two wave fields arriving perpendicular to each other, interacting and leaving. When talking about waves, it is often difficult to explain that wave heights of…