This video is chapter 5 in my series on special relativity, and it covers how things that are moving (that is, moving relative to an inertial reference frame) at different speeds appear to be shorter in length... and longer in length. And shorter in time, and longer in time. It all makes sense, I promise, and is clear when you use the Lorentz transformation of coordinates of the events in question, enacted with a mechanical minkowski diagram, aka mechanical Lorentz transformation, aka spacetime globe.
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Thanks to Nima Doroud for contributions. Created by Henry Reich
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https://www.youtube.com/watch?v=oJGFei3wKs4
Pianos can't be perfectly tuned - it's a mathematical fact!
Thanks to http://www.audible.com/minutephysics for supporting MinutePhysics.
Equal tempered tuning: https://en.wikipedia.org/wiki/Equal_temperament
Just Tuning: https://en.wikipedia.org/wiki/Just_intonation
Harmonics: https://en.wikipedia.org/wiki/Harmonic
Pythagorean vs Just Tuning: https://www.youtube.com/watch?v=QaYOwIIvgHg
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https://www.youtube.com/watch?v=1Hqm0dYKUx4
Thanks to CuriosityStream for their support. Go to http://www.curiositystream.com/minutephysics to watch Particle Fever and get Nebula!
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This video is about two-photon (gamma-gamma) physics, and how photons can interact with each other - either mediated by a passing lepton, or gravitationally via lensing, or via vacuum fluctuation pair production of vertical particles (electron-positron pair, for example). This is the so-called "box diagram" feynman diagram.
REFERENCES
Water waves interact with each other (weakly nonlinear shallow water waves)
https://en.wikipedia.org/wiki/Korteweg%E2%80%93deVriesequation
http://mathworld.wolfram.com/Korteweg-deVriesEquation.html
Paper: Absorption of Very High Energy Gamma Rays in the Milky Way
https://arxiv.org/pdf/1608.01587.pdf
Paper: Observing light-by-light scattering at the Large Hadron Collider (LHC)
https://arxiv.org/pdf/1305.7142.pdf
Mass-Energy Scale
http://labs.minutelabs.io/Mass-Energy-Scale/
Optical Depth
https://en.wikipedia.org/wiki/Opticaldepth
The electromagnetic spectrum and photon energies
http://labman.phys.utk.edu/phys222core/modules/m6/The%20EM%20spectrum.html
Gravitational Lensing
http://andybohn.com/research/lensing.html
Ask an Astrophysicist on gamma ray scattering and energies in cosmology
http://teacherlink.ed.usu.edu/tlnasa/reference/imaginedvd/files/imagine/docs/askastro/answers/970412e.html
Measuring Vacuum Polarisation with High Power Lasers
https://arxiv.org/pdf/1510.08456.pdf
Detecting vacuum birefringence with X-ray free electron lasers and high-power optical lasers
https://indico.desy.de/indico/event/12654/session/2/contribution/8/material/slides/0.pdf
Vacuum birefringence in the head-on collision of XFEL and optical high-intensity laser pulses
https://arxiv.org/pdf/1807.03302.pdf
ATLAS makes first direct detection of Light-by-light scattering at the LHC
https://atlas.cern/updates/press-statement/atlas-sees-first-direct-evidence-light-light-scattering-high-energy
Two Photon Physics
http://www.hep.ucl.ac.uk/opal/gammagamma/gg-tutorial.html
https://en.wikipedia.org/wiki/Two-photonphysics
Thesis: The Opacity of the Universe for high and very high energy γ-rays
http://inspirehep.net/record/1254304/files/desy-thesis-13-033.pdf
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Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!
Created by Henry Reich
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https://www.youtube.com/watch?v=Fv1JJ227CQk
It's leap year time... so what are years, anyway? And what do they have to do with the supermassive black hole in the core of the milky way?
Mr. Grey, of course: http://www.youtube.com/cgpgrey
Thanks to the UCLA Galactic Center: http://www.astro.ucla.edu/~ghezgroup/gc/
Their images/animations were created by Prof. Andrea Ghez and her research team at UCLA and are from data sets obtained with the W. M. Keck Telescopes.
(and I must note that the images included in this video are of simulated accuracy based on anticipated upgrades to the interferometry system - the current real images are equally impressive but slightly less clear: http://www.astro.ucla.edu/~ghezgroup/gc/pictures/Future_GCorbits.shtml )
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https://www.youtube.com/watch?v=53glKEPzElA
Which is the most intense Olympic throwing event? Shot put? Hammer? Discus? Javelin?
Also, explore a map of the big bang! http://www.bigbangregistry.com
MinutePhysics is on Google+ - http://bit.ly/qzEwc6
And facebook - http://facebook.com/minutephysics
And twitter - @minutephysics
Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!
...
https://www.youtube.com/watch?v=k3eEk-__E2U
Support me on Patreon: http://www.patreon.com/minutephysics
Previous video on No Cloning: https://youtu.be/owPC60Ue0BE
How to teleport Schrödinger’s cat: this video presents the full quantum teleportation procedure, in which an arbitrary qubit (spin, etc) is teleported from Alice to Bob by way of a pair of particles entangled in a bell (EPR) state and the transmission of information via a classical channel.
Thanks to everyone who supports MinutePhysics on Patreon!
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REFERENCES:
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https://www.youtube.com/watch?v=DxQK1WDYI_k
Behind-the-Scenes of an Airbus A350 being built!
Thanks to the folks at Airbus for bringing me to France, Germany, & the UK to visit their headquarters and facilities and see so much incredible engineering. As you can probably tell from this video, I was super excited to learn how airplanes are made and I hope you've enjoyed learning a little bit, too!
Thanks to all of the engineers, technicians and staff who took the time to share their work:
Fernando Alonso
Peter Chandler
Emanuele Costanzo
Laurence Savignac
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https://www.youtube.com/watch?v=7rMgpExA4kM
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Einstein didn't like quantum mechanics because it wasn't able to make perfect predictions... but science is not about what you like, it's about what's true!
MinutePhysics is on Google+ - http://bit.ly/qzEwc6
And facebook - http://facebook.com/minutephysics
And twitter - @minutephysics
Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!
Music by Nathaniel Schroeder http://www.soundcloud.com/drschroeder
...
https://www.youtube.com/watch?v=dmX1W5umC1c