In theoretical physics, ultraviolet completion, or UV completion, of a quantum field theory is the passing from a lower energy quantum field theory to a more general quantum field theory above a threshold value known as the cutoff. In particular, the more general high energy theory must be well-defined at arbitrarily high energies. The word "ultraviolet" in this so-called "ultraviolet regime" is only figurative, and refers to energies much higher than ultraviolet light per se. Rather, by analogy to the relationship between ultraviolet and visible light, it refers to energies higher than (and wavelengths shorter than) those "visible" to laboratory experiment. The ultraviolet theory must be renormalizable; it can have no Landau poles; and most typically, it enjoys asymptotic freedom in the case that it is a quantum field theory (or at least has a nontrivial fixed point). However, it may also be a background of string theory whose ultraviolet behavior is at least as good as that of renormalizable quantum field theories. Besides these two known examples (QFT and string theory), it could be a completely different theory than string theory that behaves well at very high energies. There is an analogous phrase "infrared completion", which applies to length scales longer than those "visible" to normal experiment, particularly cosmology distances. (Wikipedia).
AWESOME Experiments with ultraviolet light!!!
In this video i show experimets with ultraviolet C lamp. Enjoy!
From playlist ATOMIC PHYSICS
Show Me Science! I'm Looking Through You
Show Me Some Science! is a new series of podcasts from the Little Shop of Physics. In this episode we use infrared light to look through different objects. Infrared light is a kind of light we can't see that is beyond the red end of the rainbow. Some things that are opaque to visible light
From playlist Show Me Some Science!
Astronomy - Ch. 5: Light & E&M Radiation (24 of 30) Emission Spectrum of Celestial Object
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain how scientists determine the amount of an element by looking at an emission spectrum of a celestial object.
From playlist ASTRONOMY 5 LIGHT AND RADIATION
The Star of the Eclipse: The Sun | Total Solar Eclipse | Exploratorium
There are many highlights to a total solar eclipse. Whether observing on the path of totality or enjoying the Exploratorium programs online, the sun presents various features to notice during all phases of an eclipse. Exploratorium astronomer, Isabel Hawkins points out these phenomena and
From playlist Total Solar Eclipse
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From playlist Science Unplugged: Physics
The Star of the Eclipse: The Sun | Total Solar Eclipse | Exploratorium
There are many highlights to a total solar eclipse. Whether observing on the path of totality or enjoying the Exploratorium programs online, the sun presents various features to notice during all phases of an eclipse. Exploratorium astronomer, Isabel Hawkins points out these phenomena and
From playlist Total Solar Eclipse 2006-2017
EveryDay Science: Light and Color Part 12
Bees can see beyond the rainbow in the ultraviolet light. We explore the wonderful world of patterns on flowers that are made just for bees!
From playlist EveryDay Science: Light and Color -- Part 1
Light and Optics 1_1 Introduction to Reflection
Reflection and refraction
From playlist Physics - Light and Optics
Speed of Light Shift and Dilation - BLACKHOLES Part 3 - A Slower Speed of Light
Support this channel on Patreon: https://www.patreon.com/user?u=2318196&ty=h Hello and welcome to What Da Math! In this video, we will talk about what happens when you approach the event horizon of a black hole. This is a multipart video, using various simulation. In this part we will si
From playlist Educational Games Review
Light and Optics 7_2 Interference
Out of phase waves lead to interference.
From playlist Physics - Light and Optics
EDEXCEL IGCSE Physics (1P, May 2016) Part 2/2 - GCSE Physics Questions - SCIENCE WITH HAZEL
In this IGCSE Physics revision video, Hazel answers the first half of the IGCSE May 1P 2016 (Double Award) Physics exam. These videos are designed to help with your IGCSE science revision and get full marks in your IGCSE exams. For additional support Like Hazel's Facebook Page https://go
From playlist EDEXCEL IGCSE Science Exam Papers //
Electromagnetic Waves: GCSE revision
GCSE level Waves covering: Electromagnetic waves, Light, X-Ray, Gamma Ray, Ultra-violet, UV, Infra-red, Microwaves, Radio waves, UHF, VHF, Short wave, Medium Wave, Long Wave, communication, satellite, mobile phone, remote control, optical fibre, total internal reflection, photography, sign
From playlist GCSE Physics Revision
Infrared Structure of SU(N) Gauge Theory by V. Ravindran
DISCUSSION MEETING : CELEBRATING THE SCIENCE OF GIORGIO PARISI (ONLINE) ORGANIZERS : Chandan Dasgupta (ICTS-TIFR, India), Abhishek Dhar (ICTS-TIFR, India), Smarajit Karmakar (TIFR-Hyderabad, India) and Samriddhi Sankar Ray (ICTS-TIFR, India) DATE : 15 December 2021 to 17 December 2021 VE
From playlist Celebrating the Science of Giorgio Parisi (ONLINE)
What Every Physicist Should Know About String Theory: Edward Witten
https://strings2015.icts.res.in/talkTitles.php Table of Contents (powered by https://videoken.com) 0:00:00 Introduction 0:01:05 [Talk: What Every Physicist Should Know About String Theory by Edward Witten] 0:02:46 Anyone who has studied physics is familiar with the fact that while physics
From playlist Strings 2015 conference
The Mind Bending Story Of Quantum Physics (Part 1/2) | Spark
Professor Jim Al-Khalili traces the story of arguably the most important, accurate and yet perplexing scientific theory ever: quantum physics. The story of quantum physics starts at the beginning of the 20th century with scientists trying to better understand how light bulbs work. This si
From playlist Happy Birthday Professor Jim Al-Khalili!
Renormalization Group Flows and the $a$-theorem by John Cardy
Date : Wednesday, July 5, 2017 Time : 16:15 PM Venue : Ramanujan Lecture Hall, ICTS Campus, Bangalore Abstract : In 1986 A Zamolodchikov derived the remarkable result that in two-dimensional quantum field theories renormalization group flows are irreversible. T
From playlist Seminar Series
Dean Pesnell, the SDO Project Scientist, explains how the the Extreme Ultraviolet Variability Experiment (EVE) instrument will allow us to better measure solar irradiance in extreme ultraviolet wavelengths. This type of irradiance, which is absorbed completely by Earth's upper atmosphere,
From playlist Earth From Above - YouTube Space Lab with Michael Stevens
How Artist Claude Monet Was Kind Of Like a Honeybee
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY ↓ More info and sources below ↓ The famous painter who was half-honeybee Don’t miss our next video! SUBSCRIBE! ►► http://bit.ly/iotbs_sub Claude Monet had a very unique eye
From playlist Be Smart - LATEST EPISODES!
How To Make Parabolic Mirrors From Space Blankets - NightHawkInLight
Parabolic mirrors are useful for everything from solar power to telescopes to holographic projection. They're usually very difficult to make by traditional means, but this video takes a different approach. Check out my sponsor Rayton Solar here: http://bit.ly/Rayton-Solar With their incred
From playlist Practical Projects & Skills