The results from the 2026 eclipse as seen from a little field near Morat in Switzerland....
I wrote last year about the effect of CME on the thermospheric density and what are the effects on satellites inside the thermosphere, typically at the altitude of the Starlink satellites. You can find this post here....
So this post is a simple shout-out to some other blog I discovered a few months ago. At the time, I was browsing hacker news and saw this post about optics. Great! I love hacker news for this. They mostly have posts about computers and programming but every now and then, there is a post about something totally unrelated, be it optics, physics, environment, etc... but always some quality content. T...
I have always been interested with optics and vision. My path led me to a more technological approach of optics, aka photonics, but I still am fascinated by the process of vision. How the image is formed in the eye, how it is interpreted in the brain and so on. This led me to learn a few things that apparently are not so well known about our own eyes. One of these things is the subject of this pos...
I know, this comet was seen 1 and a half year ago, but I didn't had a blog then, so I have to do it now......
I wrote about Carrington events here, just a few days before the solar cycle 23 unleashed some strong storm with an X1 flare the 28th October and several other CMEs the next days... Fortunately, the impact on earth was minimal: It was a mostly a miss. But it sparked some wonderful display of aurora in the last days of October. See here and here for some nice images....
Continuing the series on lasers. In the first part, I went fast over plenty of concepts and left others on the side because they were not necessary to get a global understanding of lasers. Here, I want to get a little deeper in some specific concepts. I want to talk more in details about the gain medium of a laser and why population inversion is a vital concept....
As a physics student, our teachers would usually spend a few minutes talking about how it is extremely important to check dimensions. Back then, I was listening and not really thinking how that would help me concretely to find the answer to the problem they were giving us. I would always be puzzled by why they were talking about this, and then never, ever, using it themselves in class or during th...