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Dr Cornelia Hofmann

@coenneli.bsky.social
458 followers 101 following 109 posts

Lecturer for Physics & Maths at ZHAW. Previously researching Strong-Field Attosecond Physics at UCL, mpipks, and ETHZ (she/her) www.corneliahofmann.com

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Dr Cornelia Hofmann @coenneli.bsky.social · 12/08/2026
cycled to a viewpoint. and because i couldn't get eclipse glasses, brought a very simplistic pinhole camera, which conveniently fit into my bike basket so i didn't have to keep holding them 😁. it gave me a nice evolution of the eclipse 🌞 #iTeachPhysics #Science 🧪 #Astronomy 🔭
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Dr Cornelia Hofmann @coenneli.bsky.social · 10/08/2026
a (partial and shortly before sunset for me) solar eclipse is already so near! 🤗😁 i should really figure out where to best watch it from, so it's not hiding behind mountains 🤔 www.esa.int/Science_Expl...
esa.int
Join ESA for a total solar eclipse on 12 August 2026
Follow the total solar eclipse with the European Space Agency (ESA), in person or online. Quick links: - Overview of ESA eclipse activities & resources - Event programme in León, Spain (12 August,...
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Nature Portfolio @natureportfolio.nature.com · 16/10/2025
The Nobel Prize in Physics 2025 was awarded to John Clarke, Michel H. Devoret and John M. Martinis "for the discovery of macroscopic quantum mechanical tunnelling and energy quantisation in an electric circuit." This Collection celebrates the contributions by the awardees. ⚛️ 🧪
go.nature.com
Nobel Prize in Physics 2025
The Nobel Prize in Physics 2025 was awarded to John Clarke, Michel H. Devoret and John M. Martinis "for the discovery of macroscopic quantum mechanical ...
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Dr Cornelia Hofmann @coenneli.bsky.social · 16/09/2025
Today was a lot of fun! 😁 #iTeachPhysics Had the first physics lecture with a new class of first semesters, and my usual activity it to have them measure out the area of the lecture room with their own "measurement instrument". This year, we've had dog-leash-squared, pin board-width-squared,
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Dr Cornelia Hofmann @coenneli.bsky.social · 09/09/2025
OMG, the lense fell off my cardboard hand spectroscope, so I took it home to glue again. And while playing around to check everything, I found the best line spectrum example I have ever seen with this little thing 😄 🎢 ⚛️ #optics
Line spectrum of a white lamp, consisting of a dark blue, light blue, green, orange (maybe?), and a red line, between approximately 430 and 600 nm. The lines appear on top of a dark wavelength scale, after bouncing off a diffraction grating. The spectroscope in question, hand-built from a cardboard set.
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ETH Zurich @ethz.ch · 08/08/2025
Some nerve cells are very long, others are not. There are also differences in the length of nerve cells in the eye. Nevertheless, visual stimuli arrive in the brain simultaneously, regardless of this length. A research team from Basel has now discovered why. bsse.ethz.ch/news-and-eve...
bsse.ethz.ch
How the eye keeps time: New study reveals synchronisation mechanism in the human retina
A new study published in Nature Neuroscience reveals how our brains achieve the remarkable feat of synchronising visual signals that travel at different speeds –even within the small nervous system of...
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Dr Cornelia Hofmann @coenneli.bsky.social · 31/07/2025
👩🏼‍🔬⚛️🎢
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Dr Cornelia Hofmann @coenneli.bsky.social · 31/07/2025
It's been a while since i've posted, sorry 😑 Spring semester kinda ran away from me... besides all the usual stuff, i also had one module that we did for the first time after a curriculum reform, and another one that i joined where i have not taught that particular content before 😅 #iTeachPhysics
Pin stating "❤️ Science, it's like magic but real ❤️", pinned on a lanyard
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Dr Cornelia Hofmann @coenneli.bsky.social · 04/04/2025
Went to the dentist today, but ended up studying an old x-ray tube 😁 🎢 #Physics
Overview of the x-ray tube, which can be aimed and positioned on a 3-joint arm.Closer look at the (slightly tinted and matt) glass vacuum chamber with the anode inside (looks like it might be copper)Label identifying it as a 'Dental Röhre Ritter Dent 20', as well as listing the current (20 mA) and voltage (65 kV) values for use.view of the controls, and current/voltage indicators
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Jacopo Bertolotti @jacopobertolotti.com · 12/03/2025
#PhysicsFactlet Remake of an old animation about quantum tunnelling in the time domain. 🧪⚛️💡 A few details: * The incident and reflected wavefunctions interfere, creating fringes when it hits the barrier. * Even when far away from the barrier, the wavefunction is slowly broadening.
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Dr Cornelia Hofmann @coenneli.bsky.social · 09/03/2025
oh gosh, i just received an email from my first ever cohort here, making me all emotional, because they're preparing to graduate in summer 🥹
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Laser Focus World magazine @laserfocusworld.bsky.social · 07/03/2025
Happy International Women's Day! We're celebrating a day early by sharing some of the amazing work of the women within our community we've covered so far in 2025. www.laserfocusworld.com/science-rese... #women #optics #photonics #quantum #scisky @jmurphoton.bsky.social
laserfocusworld.com
Celebrating women in optics, photonics, and quantum
To celebrate International Women's Day on March 8th, check out some of the cool optics, photonics, and quantum work being done by women.
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ETH Zurich @ethz.ch · 07/03/2025
Researchers have developed a method that makes it easier to study interactions between electrons in a material. Using a moiré material consisting of twisted atomic layers they created an artificial crystal lattice in a neighbouring material. ethz.ch/en/news-and-...
ethz.ch
Crystal lattice at a distance
Researchers at ETH Zurich have developed a method that makes it easier to study interactions between electrons in a material. Using a moiré material consisting of twisted atomic layers they created an...
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Simon Clark @simonoxfphys.com · 01/03/2025
It can feel like we have made no progress in the fight against climate change. That's not the case. youtu.be/h1jOqyjcO4g?...
youtu.be
How much progress have we made on climate change?
YouTube video by Simon Clark
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Young Atom Opticians Conference 2025 @yao2025.bsky.social · 21/01/2025
🎉 Registrations for YAO 2025 are OPEN! 📅 Join us July 6–11, 2025 in Innsbruck, Austria for talks, poster sessions, industry talks & networking! 🔗 Register by the 31st of March: yao.iqoqi.at Don’t miss out! 🌍⚛ #YAO2025 #QuantumPhysics #AMO @iqoqi.bsky.social @uniinnsbruck.bsky.social
yao.iqoqi.at
YAO 2025 - Home
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ETH Zurich @ethz.ch · 31/01/2025
She won the Swiss figure-skating championships before developing an interest in quantum computing. ETH Zurich alumna Bettina Heim is optimistic that quantum computers will eventually live up to their potential. Read the portrait here: ethz.ch/en/news-and-...
ethz.ch
From loop jumps to quantum leaps
Bettina Heim won the Swiss figure-skating championships before developing an interest in quantum computing. She studied physics at ETH and now develops software for the computers of the future.
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ETH Zurich @ethz.ch · 24/01/2025
Today is the International Day of #Education. To mark the occasion, we’re resharing this article: ETH doctoral student Rolf Imseng, ETH Vice President Julia Dannath, and Professor Ursula Renold discuss how education drives #Social #Mobility in Switzerland. ethz.ch/en/news-and-...
ethz.ch
What are the key requirements of an education system that ensures that everybody has the same opportunities?
ETH doctoral student Rolf Imseng comes from a working class family. Together with ETH Vice-President Julia Dannath and ETH Professor Ursula Renold, he talks about the hurdles that his background bring...
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Republik Magazin @republik.ch · 23/01/2025
Wie die Solarenergie ein exponentielles Wachstum hingelegt hat – dies ist der Start einer Daten­serie von @herrfischer.bsky.social über die grossen Entwicklungen der vergangenen 25 Jahre.
republik.ch
Serie «Das erste Viertel», Folge 1: Wie die Welt zu Solarenergie kommt
Ein Blick auf Megatrends, die die ersten 25 Jahre des 21. Jahrhunderts geprägt haben.
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Dr Cornelia Hofmann @coenneli.bsky.social · 15/01/2025
first 🎢 exam of this season down, so now i'm enjoying our on-campus restaurant 😋 , before correction hell looms...
chestnut spaetzle with braised chicory á l'orange
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Simon Poliakoff @simonpoliakoff.bsky.social · 09/01/2025
Great to see @phetsims.bsky.social have arrived on bluesky. I love using their simulations in my teaching and in my videos. #ITeachPhysics
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Dr Cornelia Hofmann @coenneli.bsky.social · 20/12/2024
here we go! 💪💜
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Dr Cornelia Hofmann @coenneli.bsky.social · 05/12/2024
I started electromagnetism in one of my classes. This experiment is not all too "jaw-dropping-impressive", but has proven very effective. I start out with the current off to just discuss magnets, compass needles, and magnetic vs geographic poles. 🎢 ⚛️
Many tiny compass needles distributed on a plexiglas sheet around a conductor, though the voltage source is off, no current flowing. The compass needles are all roughly parallel, and pointing towards geographic north, verified with a standard orientation/navigation compass.
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Bluesky @bsky.app · 03/12/2024
Scientists, academics, researchers: We’re excited to share that @altmetric.com is now tracking mentions of your research on Bluesky! 🧪
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Mr. Spock 🖖 @spockresists.bsky.social · 27/11/2024
Eating too much cake is the sin of gluttony. However, eating too much pie is okay because the sin of pi is always zero. 🖖
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Rob McEntarffer @rmcenta.bsky.social · 27/11/2024
Assessment is uncomfortable. robmcentarffer.net/uncategorize...
robmcentarffer.net
Assessment is Uncomfortable
When I was a new teacher, I used what I now call the “oh crap” model of assessment: I would teach for several days, students and I would have great conversations, and then I would realize after a whil...
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Phil Lynch @physlynch.bsky.social · 20/11/2024
Just came across this handy labeller for showing off your STEM subfield. Be sure to give it a try! They also have life sciences, chemistry and engineering 🧪⚛️🎢🔭
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VeritasKnight @veritasknight.bsky.social · 15/11/2024
we rate dogs has made the jump. it's real now.
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Dr Cornelia Hofmann @coenneli.bsky.social · 12/11/2024
quote with a picture of water that you took
tiny step/waterfall in a stream, where the edge is smoothly rounded that it almost looks like laminar flow going over
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Dr Cornelia Hofmann @coenneli.bsky.social · 11/11/2024
Today some of my students held a presentation discussing mutual learning between the ML model and the pilot for brain-computer-interface races at @cybathlon.bsky.social And they concluded by encouraging their fellow students to go check out all the different diciplines 🤗 cybathlon.ethz.ch/en
cybathlon.ethz.ch
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Wouter Ellenbroek @wg-ellenbroek.bsky.social · 24/10/2024
Every single base and derived SI unit named after a person is named after a man. There are 19 named SI units, and it is time that we named one after a woman. chng.it/zJZyzxRnjV #physics #AcademicSky
chng.it
Sign the Petition
Honor Emmy Noether With the Unit For Momentum
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Under the Microscope @underthemicroscope.bsky.social · 14/10/2024
(Admin) 📣Fastest Camera to Capture Electron Dynamics📣 Please welcome Francesca Calegari (@fracala.bsky.social) for a wonderful week of Attosecond Science⚛️ 👩‍🔬 🎙️ 🔬 🧪 #SciComm #Physics #Optics 🎧 Francesca's conversation w/ @pranoti.bsky.social👇 open.spotify.com/episode/6S2P...
open.spotify.com
224. Fastest Cameras to Capture Electrons ft. Francesca Calegari l Pranoti Kshirsagar
Under the Microscope · Episode
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Dr Cornelia Hofmann @coenneli.bsky.social · 14/10/2024
This just made me think of a new way to discuss the 1st-class-activity focused on observabes, units and measurement accuracy 😂 #iTeachPhysics
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Dr Cornelia Hofmann @coenneli.bsky.social · 16/09/2024
Here we go, my third go-around for the autumn semester! Looking forward to a bunch of new first years, one module with a class of second years, and I get to see one of my first ever classes again in their third year, as a guest during the semester 🤗
Calendar item declaring today the first day of the autumn semester
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Dr Cornelia Hofmann @coenneli.bsky.social · 03/09/2024
And it worked! Since the radio sound can't be "seen" in the picture, I took a photo of the oscilloscope with the 1MHz oscillation nicely displayed. The radio signal can only be heard at (very) close distance, and with lots of static noise, but the song was recogniseable 😂 #iTeachPhysics
Colpitts oscillator circuit built on a small breadboard, with an external voltage supply and an oscilloscope analysing the resonance frequency of the circuit. The display shows a nice sine curve.
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Dr Cornelia Hofmann @coenneli.bsky.social · 01/09/2024
Did some last-minute prep for a workshop this coming week 📱📡📻🎶 If all goes well, the students should be able to build their own amplitude modulation radio transmitter 🙏 #iTeachPhysics
Some of the electronics sets for building a colpitts oscillator, filled into baggies and labelled with the circuit schemeExample build of the oscillator on a breadboard
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Rachel Lense is Professionally Curious @rachellense.bsky.social · 29/08/2024
BlueSkience Alert! 🧪🌍🛰️ NASA's Earth Observatory has a page where you can generate your name (or any word) using Landsat images. Of course, I chose to generate ✨SCIENCE✨ landsat.gsfc.nasa.gov/apps/YourNam...
A series of images with physical features seen from space that look like letters of the English alphabet. The photos spell the word "science"
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Physghoul 👻 🎃 @physgal.bsky.social · 29/07/2024
Interesting to see which factors influence someone to choose to study physics at university. Big shout out for informal science education (museums, camps etc.) and high school physics teachers (especially for women 👩🏻‍🔬). 🧪 🔭 ⚛️ 🎢 🍎 #scicomm #AcademicSky
ww2.aip.org
Physics Bachelors: Influences and Backgrounds - AIP.ORG
What Experiences Influence Student’s Decisions to Major in Physics?
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Dr Cornelia Hofmann @coenneli.bsky.social · 30/07/2024
Today is a prep day for the upcoming Science Week, www.zhaw.ch/de/lsfm/dien... where we'll entertain teenagers on campus with various full-day-programs. Our team is offering Arduinos with sensor input and motor control 🤗💡 #iTeachPhysics #WomenInSTEM
Boxes prepared with motor hardware, Arduino boards, and various peripheries and cables)
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Brian J. Enquist @bjenquist.bsky.social · 19/07/2024
For those unit enthusiasts out there... did you know that several fundamental units were redefined? Four of the seven SI base units were redefined in terms of natural physical constants rather than human artifacts, such as the standard kilogram en.wikipedia.org/wiki/2019_re... 🧪
en.wikipedia.org
2019 redefinition of the SI base units - Wikipedia
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Rachel Lense is Professionally Curious @rachellense.bsky.social · 14/06/2024
I made this Pride flag using only NASA images and our team thought it would be cool to share on social (I work on the NASA heliophysics communications team), but it's getting all sorts of hate on the bird app and Fbook. Thought y'all might be more appreciative of it here. ☺️🏳️‍🌈💖
A pride flag with every color band represented by a NASA image. White is Earth clouds, pink is aurora, blue is the Sun in a specific wavelength, brown is Jupiter clouds, black is the Hubble deep field, red is the top of sprites, orange is a Mars crater, yellow is the surface of Io, green is a lake with algae, blue is Neptune, and purple is the Crab Nebula in a specific wavelength.
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Dr Cornelia Hofmann @coenneli.bsky.social · 02/06/2024
Doing experiments on resonance frequencies 🤔
Photo of a glockenspiel, two timpani and various other smaller percussion instruments
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Matt Dunphy @leviathant.com · 10/05/2024
Apparently this is a collection of outdoor webcams from Europe, and - at least at the time of my posting - tonight's aurora is pretty intense on *all* of them www.foto-webcam.eu/webcam/luckn...
foto-webcam.eu
Lucknerhaus - Blick zum Großglockner - Foto-Webcam.eu
Webcam Lucknerhaus - Blick zum Großglockner
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James Petruzzi @hawaiianimages.bsky.social · 11/05/2024
Have to trot out the obligatory XKCD tonight. No aurora in Hawaii, we've got massive amounts of clouds and rain in any case. :) 🧪
XKCD cartoon about what it means if you see an aurora, by latitude. Poles are labeled "normal", temperate zones "cool and exciting" and "someone should check on our satellites" (working towards the equator). The equator is labeled "A bunch of open questions in solar-terrestrial physics are about to be answered"
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Claire Lonsdale @clairelonsdale.bsky.social · 11/05/2024
Spent 4 hours taking 150 photos of the sky 🧪
Photo shows the northern lights in green, pink and blue with a dark play park on the horizon
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David Blanchflower BSc @davidbflower.bsky.social · 11/05/2024
The aurora was truly spectacular. Will it look as good tonight? 🔭 🧪 #astrophotography
Red and green aurora with bushes.
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Dr Cornelia Hofmann @coenneli.bsky.social · 27/04/2024
The release of this video by Simon Clark wonderfully timed with the two week course I just attended, where we eventually talked about modelling digital twins of bioreactor manufacturing processes 😅 youtu.be/w5GmDRW975g?...
youtu.be
How green is fake meat, really?
Meat alternatives are greener than meat, right? Well, let's look at the data. To try everything Brilliant has to offer for free for a full 30 days, visit htt...
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Dr Cornelia Hofmann @coenneli.bsky.social · 19/03/2024
Today I managed the most beautiful demonstration of laminar flow around a slender boat shape, but I couldn't move or just my steps would disturb the pattern already, so I didn't get to take pictures 😭 🧪 #iTeachPhysics #Physics
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Dr Dan Jones @hookean.bsky.social · 14/03/2024
Happy Pi day #iTeachPhysics
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Dr Cornelia Hofmann @coenneli.bsky.social · 13/03/2024
🧪 #iTeachPhysics Today's practical demonstration (and hands-on experience for the students was my yoyo from "back when I was in school..." 😅 I'm hoping this will be a more memorable way of conceptualising the centripetal force 🤞
Photo of a purple yoyo labelled "profi yoyo", which allows the axis to free-run if it is thrown with enough force
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Physghoul 👻 🎃 @physgal.bsky.social · 08/03/2024
Happy International Women’s Day to all of the amazing #WomenInSTEM out there. Let's keep pushing for systemic change. #InternationalWomenDay 👩🏻‍🔬 🎢 🧪 ⚛️ 🔭
Poster which states: "We need systemic change, not more workshops for girls."
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