refraction – Adventures in Oceanography and Teaching

Total internal reflection

mglessmer — Sat, 25 Feb 2023 08:42:04 +0000

In the “static apnea” discipline in freediving, many cool pictures of athletes are taken underwater in a way that plays with the reflection of the athlete in the still water surface. This can lead to pretty spooky pictures (like the one of Victor in the top left). We do have other experiences with water, where […]

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Sunday #wavewatching. Shallow water waves, deep water waves, #wakewatching, reflections, refractions, and more.

mglessmer — Sun, 26 May 2019 15:03:37 +0000

This is the blogpost I wanted to write today before I got distracted by all the adventures on MS Stadt Kiel with sightseeing and swing dancing and all the good stuff that wasn’t wave watching. I had even uploaded all the pictures of this morning’s wave watching walk on my blog already, but then things just […]

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The wonders of a Wadden Sea. Or what someone addicted to #wavewatching thinks they are

mglessmer — Tue, 07 May 2019 13:05:39 +0000

As someone living on the German Baltic Sea coast, I don’t spend a lot of time on the North Sea coast (except, actually, my week-long vacation after Easter with my godson and his family, and when my friend Frauke and I went to Sylt earlier this year, or when Frauke and I are going back […]

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Influence of wind and water depth on a wave field (or: a beach vacation in Dornumersiel)

mglessmer — Mon, 06 May 2019 13:05:42 +0000

I took the selfie above mainly to send to my mom from my vacation in Dornumersiel on the German North Sea coast. But then when looking through the hundreds of pictures I took that day, I realized that not only was my hair parted on the wrong side because it was so windy (ha!), the […]

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Reflecting waves, reflected and refracted light, and a Fata Morgana

mglessmer — Sat, 23 Feb 2019 10:50:55 +0000

How much physics can you spot in a single picture? What I see here: Waves and their reflection on the sea wall (Do you see the two main fields? One coming in from the top right, and then the other one (technically the reflection of the first one) going out to the top left) Total […]

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Guest post: Alice shows magic tricks and explains refraction of light in water

mglessmer — Sat, 12 Jan 2019 07:50:11 +0000

My friend Alice Langhans runs a super cool science communication Instagram (@edu_al_ice), where she posts about her experiences as PhD student in physics education research. And there is a lot more going on on that Instagram than just pretty (but oh so pretty!) pictures. I make sure to read all her posts, because there are always […]

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The first autumn storm and its impact on dye tracer and water level

mglessmer — Sat, 22 Sep 2018 05:39:43 +0000

Last night it rained a lot. So the first thing to do this morning was to check what that had done to my green lake! The dye is now a lot more diluted, but overall it still looks surprisingly green seeing that there is a lot of rain water draining into the lake. To give […]

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Wave watching: Refraction and diffraction of waves

mglessmer — Wed, 19 Sep 2018 13:20:42 +0000

A little more wave watching, today with a focus on how waves change direction when they run into shallow water. Let’s look at this beautiful wave and see what happens when it reaches the shallow shore. Above, you see the wake of the pilot ship, consisting of many wavelets that propagate as parallel wave crests towards […]

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Weekend wave-watching

mglessmer — Sat, 08 Jul 2017 18:26:18 +0000

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 of which I’ll share with you now. For example below you see where the Schlei flows into the Baltic Sea. This is actually a fairly […]

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Refraction of waves towards the beach

mglessmer — Thu, 29 Jun 2017 11:08:04 +0000

As you see from my parents’ attire and the lack of leaves on the trees, these pictures are not brand new. But still interesting: Do you see how the waves are bent towards the coast as they run into shallower water? And can you believe I still have to look up which one is refraction […]

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