#scattering — Public Fediverse posts

#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.
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.
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. 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|²).
So the quantity we measure is proportional to |Eᵢₙ +Eₛ|², which is the sum of the Poynting vector of the incident field, the Poynting vector of the scattered field, plus the cross terms. 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).

#Scattering #Electrodynamics

#PhysicsFactlet
I haven't made a single scientific animation in months. I just don't have the mental space right now.
But I am preparing a series of lectures on scattering for the Plasmonica 2026 School (https://www.plasmonica.it/2026school/), and it feels like a good excuse to make a few new ones.

This one shows a simple finite element simulation of a pulse scattering on a small dielectric obstacle.

#Physics #Optics #Scattering #Diffraction

#DESY #PhotonScience sucht 1 Nachfolger für Oliver:

https://v22.desy.de/e67416/e308946/index_eng.html

* group leader of 11 beamline teams, laboratories and sample environment
* Responsible for the user operation of #PetraIII
* designing and implementing the beamline and support team portfolio within the #PetraIV project

* Excellent knowledge in application of #synchrotron radiation in terms of #diffraction, #scattering and/or related #XRay #imaging techniques (such as diffraction imaging, #Bragg-CDI, tensor #tomograpahy) and the development of methods and instrumentation

#AcademicChatter #AcademicJobs

#SciArtSeptember Day 29: Scattering

I accidentally found this effect while brooming one day, is it scattering the light?
Uploading the vid so you can see how the rings of light change depending on the position of the reflecting metal.

#physics #light #scattering #PhonePhotography

#Friend #Scatters #LovedOne’s #Ashes At #Melbourne #Gay #Bar.

Giving “#RestinGlitter” a whole new meaning, #friends of a #dearlydeparted #individual found an unconventional way to #honour their #memory—by #scattering their #ashes on the #stage at #Melbourne’s beloved gay bar, #Sircuit, right in the middle of a #dragperformance.

#Women #Transgender #LGBTQ #LGBTQIA #Australia #Melbourne #Entertainment #NightLife #Drag #DragQueens #Representation #Culture

https://www.starobserver.com.au/news/friend-scatters-loved-ones-ashes-at-melbourne-gay-bar/232293

#Friend #Scatters #LovedOne’s #Ashes At #Melbourne #Gay #Bar.

Giving “#RestinGlitter” a whole new meaning, #friends of a #dearlydeparted #individual found an unconventional way to #honour their #memory—by #scattering their #ashes on the #stage at #Melbourne’s beloved gay bar, #Sircuit, right in the middle of a #dragperformance.

#Women #Transgender #LGBTQ #LGBTQIA #Australia #Melbourne #Entertainment #NightLife #Drag #DragQueens #Representation #Culture

https://www.starobserver.com.au/news/friend-scatters-loved-ones-ashes-at-melbourne-gay-bar/232293

#Friend #Scatters #LovedOne’s #Ashes At #Melbourne #Gay #Bar.

Giving “#RestinGlitter” a whole new meaning, #friends of a #dearlydeparted #individual found an unconventional way to #honour their #memory—by #scattering their #ashes on the #stage at #Melbourne’s beloved gay bar, #Sircuit, right in the middle of a #dragperformance.

#Women #Transgender #LGBTQ #LGBTQIA #Australia #Melbourne #Entertainment #NightLife #Drag #DragQueens #Representation #Culture

https://www.starobserver.com.au/news/friend-scatters-loved-ones-ashes-at-melbourne-gay-bar/232293

#Friend #Scatters #LovedOne’s #Ashes At #Melbourne #Gay #Bar.

Giving “#RestinGlitter” a whole new meaning, #friends of a #dearlydeparted #individual found an unconventional way to #honour their #memory—by #scattering their #ashes on the #stage at #Melbourne’s beloved gay bar, #Sircuit, right in the middle of a #dragperformance.

#Women #Transgender #LGBTQ #LGBTQIA #Australia #Melbourne #Entertainment #NightLife #Drag #DragQueens #Representation #Culture

https://www.starobserver.com.au/news/friend-scatters-loved-ones-ashes-at-melbourne-gay-bar/232293

#Friend #Scatters #LovedOne’s #Ashes At #Melbourne #Gay #Bar.

Giving “#RestinGlitter” a whole new meaning, #friends of a #dearlydeparted #individual found an unconventional way to #honour their #memory—by #scattering their #ashes on the #stage at #Melbourne’s beloved gay bar, #Sircuit, right in the middle of a #dragperformance.

#Women #Transgender #LGBTQ #LGBTQIA #Australia #Melbourne #Entertainment #NightLife #Drag #DragQueens #Representation #Culture

https://www.starobserver.com.au/news/friend-scatters-loved-ones-ashes-at-melbourne-gay-bar/232293

Homemade Raman Laser is Shaken, Not Stirred - You wouldn’t think that shaking something in just the right way would be the recip... - https://hackaday.com/2023/12/12/homemade-raman-laser-is-shaken-not-stirred/ #nonlinearoptics #laserhacks #ineleastic #scattering #science #stokes #laser #raman #dmso

https://www.nature.com/articles/s41586-023-06018-3

"Here, we realize a Fermi gas featuring both strong, tunable contact interactions and #photon-mediated, spatially structured long-range interactions in a transversely driven high-finesse #optical cavity. Above a critical long-range interaction strength, density #wave order is stabilized in the system, which we identify via its #superradiant light-#scattering properties."

#densityWave #superfluid #quantumMaterial #phaseTransition

https://www.nature.com/articles/s41586-023-06018-3

"Here, we realize a Fermi gas featuring both strong, tunable contact interactions and #photon-mediated, spatially structured long-range interactions in a transversely driven high-finesse #optical cavity. Above a critical long-range interaction strength, density #wave order is stabilized in the system, which we identify via its #superradiant light-#scattering properties."

#densityWave #superfluid #quantumMaterial #phaseTransition

https://www.nature.com/articles/s41586-023-06018-3

"Here, we realize a Fermi gas featuring both strong, tunable contact interactions and #photon-mediated, spatially structured long-range interactions in a transversely driven high-finesse #optical cavity. Above a critical long-range interaction strength, density #wave order is stabilized in the system, which we identify via its #superradiant light-#scattering properties."

#densityWave #superfluid #quantumMaterial #phaseTransition

https://www.nature.com/articles/s41586-023-06018-3

"Here, we realize a Fermi gas featuring both strong, tunable contact interactions and #photon-mediated, spatially structured long-range interactions in a transversely driven high-finesse #optical cavity. Above a critical long-range interaction strength, density #wave order is stabilized in the system, which we identify via its #superradiant light-#scattering properties."

#densityWave #superfluid #quantumMaterial #phaseTransition

Kai Bagschik: PETRA IV #beamline portfolio

- #coherent #scattering and #imaging
- high #resolution at high speed
- coherent high-energy #Xrays