Jacopo Bertolotti @jacopobertolotti.com

Associated Professor of Physics at the University of Exeter.
Scientific visualizations (grouped under the hastag #PhysicsFactlet).
He/lui/on. All opinions are my own fault.

Due to its yellowness, a friend of mine dubbed him "Orconzola", so this is now his name forever.
#MiniaturePainting #Warhammer #Orc
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πŸ“’ At #EOSAM2026, Jacopo Bertolotti will present the tutorial
β€œScientific Visualizations: Animating Physics for Science Communication.”

πŸ”— More information: tinyurl.com/mt9rrhtn

πŸ—“οΈ Submission deadline: April 14
πŸ”— Submit now: www.conftool.com/eosam2026

#ScientificVisualization

@jacopobertolotti.com
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Good article, worth reading.
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One more finished model, a million new things I tried for the first time. The most notable were blending contrast paints, and the crackling on the base.
Biggest mistake was not to undershade enough before applying the contrast paints.
#MiniaturePainting #WH40k #Warhammer
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Reposted by Jacopo Bertolotti
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Katie Mack @astrokatie.com
9d
If I were on a mission whose computer system required me to deal with Microsoft Outlook in space, I’d give up and go back to the slide rule
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⏳ Less than two weeks left to submit your abstract for #EOSAM2026!

Join us in Tampere for a dynamic week of cutting-edge research, industry insights, and networking with a global community of experts.

Submit & register here: tinyurl.com/yty3nt78

More info: tinyurl.com/3y98bxay

#Photonics #Optics
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Part of me wants this to be the best April's Fool in history. Part of me wants it to be real.
#Warhammer #WH40k
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This is the original sin of higher education.

(So many) students see University as a away to access better paid jobs.
Universities see students as income.
(So many) professors see teaching as the price they have to pay to be allowed to do research.

Learning is almost never discussed.
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Literature Only
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Big win of the week: I had @gevero.bsky.social try out the traditional Florentine #Lampredotto 🀀
(The stand in Porta Romana changed owner some time back, but the new guys tuned out to be good.)
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Reposted by Jacopo Bertolotti
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SIOF-Plasmonica @plasmonica.bsky.social
16d
Tough questions being asked and sad truths being revealed by @jacopobertolotti.com at #PlasmonicaSchool2026 πŸ‘Ή
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Do I know anyone here with experience in laser ablation? I have a VERY stupid question to ask πŸ™‚ πŸ’‘
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Reposted by Jacopo Bertolotti
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SIOF-Plasmonica @plasmonica.bsky.social
18d
@jacopobertolotti.com decided it is time to justify our presence at the Galileo Galilei Institute for Theoretical Physics! Flexing classical field theory with Feynman diagrams πŸ˜΅β€πŸ’« at #PlasmonicaSchool2026!
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Reposted by Jacopo Bertolotti
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SIOF-Plasmonica @plasmonica.bsky.social
18d
#PLASMONICAschool2026 has started today in Arcetri! This morning we had πŸ‘¨β€πŸ« Francesco Monticone (@cornelluniversity.bsky.social) delving deep into the subtleties of light-matter interaction fundamentals and @jacopobertolotti.com (@exeter.ac.uk) guiding us through the intricacies of optical scattering.
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When I was in year 3 they moved us to a much uglier but brand new building on the outskirt of the city (where having a lab was MUCH easier). I've never been back, and it is weird to now being the professor instead of the student. Even just for a summer school.
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I haven't been here in 20 years.
When I was a student, Physics at the University of Florence was in this old, beautiful villa on the hill of Arcetri (not far away from Galileo's villa).
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#UniversityOfFlorence #PlasmonicaSchool
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These cross terms are what we usually call "extinction" and are the result of the interference between the incident and scattering fields (and the reason why you get a "shadow" behind the scatterer).

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So the quantity we measure is proportional to |Eα΅’β‚™ +Eβ‚›|Β², which is the sum of the Poynting vector of the incident field, the Poynting vector of the scattered field, plus the cross terms.

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In most cases of interest, the modulus of the Poynting vector is proportional to the modulus squared of the electric field (which explains why we often that a shortcut and just talk about |E|Β²).

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If we were able to measure directly the field (as we can do in the microwave regime) we could happily stop here, but in optics we can only measure intensities, and the intensity is defined as the time average of the modulus of the Pointing vector.

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Imagine to illuminate a small object with a beam of light. If the object is small the scattered field will be essentially a spherical wave, and the total field will be the incident one plus the scattered field.

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#PhysicsFactlet
Scattering VS Extinction
In #Optics, the concepts of scattering and extinction are closely related. So closely related that many people tend to confuse them.

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πŸ’‘ βš›οΈ πŸ§ͺ 🎒
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Did you know that ⍼ is the symbol for "azimuth"? I didn't.

ionathan.ch/2026/02/16/angzarr.html

via @xmau.bsky.social
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βˆƒ Maths joke.
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Reposted by Jacopo Bertolotti
tukohbin.bsky.social's profile picture
Eugene Lim @tukohbin.bsky.social
24d
www.bbc.co.uk/news/articles/czr0zmzzp84o
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🚨Save Languages at the University of Essex 🚨 #langsky #linguistics

UoE plans to cut German, Italian, Portuguese and Chinese + all evening classes and merge Language and Linguistics with a larger unit. Only 2 languages will remain next October. Please sign our letter:

tinyurl.com/SaveLingLangEssex
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Reposted by Jacopo Bertolotti
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Eniko Fox @enikofox.com
1mo
in 10 years age verification will be so entrenched as the status quo that saying age verification is bad and ineffective will get responses like "well what do you propose, *not* have age verification?" like it's a foregone conclusion and was always there

mark my words
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Reposted by Jacopo Bertolotti
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Dulwich Quantum Computing @dulwichquantum.bsky.social
1mo
BREAKING: For the first time in 35 years the Ig Nobel ceremony will move to Europe. "There are no immediate plans to return the ceremony to the US."
www.theguardian.com/science/2026/mar/09/ig-nobel-prize-europe

Food for thought for conference steering committees.
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