How to create photons you can see

Подписаться 217 тыс.

Просмотров 12 тыс.

50% 1

Scintillating detectors at CERN rely on luminescence, sometimes known as "cold light", to detect high-energy particles. In the first video of the online course of the #CERNSolvayEducation Programme, we discuss how light is created, how incandescence ("warm light") differs from luminescence ("cold light") and how we use the latter in scintillation detectors. Find the interactive version of this video over on our website: cern.ch/photons.
As part of the education portfolio of #CERNScienceGateway, the #CERNSolvayEducation programme was launched by CERN jointly with @SolvayGroup for the #STEMeducation of high-schoolers. It is designed for teenagers who want to go beyond high-school physics and get an introduction to CERN #physics and #technology. In each video, you can test your understanding by answering quiz questions. If you are at least 16 years old, you can enrol for free in the online CERN-Solvay Education Programme towards obtaining a digital certificate, which will allow you to apply for a CERN-Solvay residential student camp.
Enrol for free in the online course of the CERN-Solvay Education Programme: cern.ch/solvay-course
Find all the videos of the CERN-Solvay Education Programme: • CERN-Solvay Education ...
____________________________________________________
Chapters
0:00-1:18 Introduction
1:18-5:39 Incandescence
5:59-12:27 Luminescence
12:27-16:40 Fluorescence & phosphorescence
16:40-18:03 Scintillators
18:03-19:15 Conclusion
____________________________________________________
External works referenced in this video:
Visible Spectra of the Elements - umop.net/spectra/
Taboada, Carlos, et al. "Naturally occurring fluorescence in frogs." PNAS 114.14 (2017): 3672-3677 - www.pnas.org/doi/full/10.1073...
Anich, Paula Spaeth, et al. "Biofluorescence in the platypus (Ornithorhynchus anatinus)." Mammalia 85.2 (2021): 179-181 - www.degruyter.com/document/do...
Black body spectrum in log-log scale - commons.wikimedia.org/wiki/Fi...
____________________________________________________
Research articles and presentations to go further:
University-level introduction to luminescence (in French): Valeur, Bernard. "Lumière et luminescence." 2e édition, Bibliothèque Scientifique, Belin, 2017. www.belin-editeur.com/lumiere...
Valeur, Bernard, and Mario N. Berberan-Santos. "A brief history of fluorescence and phosphorescence before the emergence of quantum theory." Journal of Chemical Education 88.6 (2011): 731-738. pubs.acs.org/doi/10.1021/ed10...
d’Ambrosio, Carmelo. "A short overview on scintillators." CERN, 13 April 2005. ph-dep-dt2.web.cern.ch/CAT200...
The Crystal Clear Collaboration conducts research on scintillators and detectors for the LHC and future accelerators crystalclearcollaboration.web... home.cern/news/news/experimen...

Наука

Опубликовано:

14 июн 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 38

@shoot-n-scoot3539 3 месяца назад

That was great. Looking forward to more videos from CERN.

@justinengbrecht1837 Год назад

This was so crucial to my understanding of the link between light and electrons, many thanks!

@diogosoaresmendes Год назад

Great format CERN, keep it up.

@Darkanight Год назад

Very didatic and interesting

@pavangaonkardonigadde Год назад

Amazing! I need more like this

@maliknaveed9556 Год назад

I can see photons since my childhood with naked eyes.

@maliknaveed9556 Год назад

It was my hobby to set in sunlight and enjoy photons shower and try to focus on one and observe it's movement. This phenomenon is more visible in early hours of sun rise, although you can observe it any time in daylight.

@h7opolo Год назад

9:43 the accompanying sound effect is synaesthetically appropriate which is conducive to learning.

@anywallsocket Год назад

Very concise! Thank you :)

@DJElixir Год назад

Hi CERN! I love your work

@jishanttalwar7538 Год назад

Great explanation and I loved the animations. It made the content easy to understand. Thanks for the video. Looking forward to more such content. And to be honest, it is my dream to work at CERN. So, hoping to get there some day.

@schmetterling4477 8 месяцев назад

Well, if you were to say the same things in a physics exam, then they will never let you work at CERN. They will simply fail you. :-)

@krishnabhutada3983 Год назад

Fantastically explained...

@lambda4931 Месяц назад

One million points to you. Thanks

@Muonium1 Год назад

In fact, there is nothing particularly special about incandescence which sets it apart from other forms of luminescence if we think about it a little deeper. In incandescence, the electrons are still individually only emitting discrete photons of energy at specific single wavelengths, or colors, and they're still restricted to "jumping" in specific quantum transitions of energy. It's just that there is such an enormous multitude of individual energy levels available to an electron in a solid material like iron in a forge, or molten rock in flowing lava, or collagen molecules in your skin, that taken together they appear to continuously fill the entire spectrum. Incandescence is simply the word humans use when an object is hot enough such that the "blackbody" radiation it emits is short enough in wavelength to be detected by the unaided eye. This temperature is called the Draper point, and for humans, it occurs at ~525 °C.

@h7opolo Год назад

8:34 technically, the electron frequency, since it both a particle and a wave, increases or decreases in response to incident photons.

@jannatnoor963 Год назад

the video was very informative. thank u

@schmetterling4477 8 месяцев назад

Also completely wrong in many aspects. If this was written by a physicist, then he needs to give his degree back. ;-)

@hgracern Год назад

Surely colour is created by the cortex? Not by “sources” outside….idk.

@petramomotoso4361 Год назад

Everybody has the gift to see photons.

@PotionsMaster666 Год назад

Blind people be like 👁️👄👁️

@octavian_2 Год назад

Great video! How can I find other videos in this education series? Hashtags are of no help and on CERN website there's nothing on this. If I'm not aware of something, then please leave me a comment.

@jishanttalwar7538 Год назад

Hi, In the description you can find the link for the playlist. It has 3 videos only.