Do Photons Cast Shadows?

Do Photons Cast Shadows? with tags physics, minutephysics, science

Thanks to CuriosityStream for their support. Go to http://www.curiositystream.com/minutephysics to watch Particle Fever and get Nebula! Support MinutePhysics on Patreon! http://www.patreon.com/minutephysicsLink to Patreon Supporters: http://www.minutephysics.com/supporters/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.REFERENCESWater waves interact with each other (weakly nonlinear shallow water waves)https://en.wikipedia.org/wiki/Korteweg%E2%80%93deVriesequationhttp://mathworld.wolfram.com/Korteweg-deVriesEquation.htmlPaper: Absorption of Very High Energy Gamma Rays in the Milky Wayhttps://arxiv.org/pdf/1608.01587.pdfPaper: Observing light-by-light scattering at the Large Hadron Collider (LHC)https://arxiv.org/pdf/1305.7142.pdfMass-Energy Scalehttp://labs.minutelabs.io/Mass-Energy-Scale/Optical Depthhttps://en.wikipedia.org/wiki/OpticaldepthThe electromagnetic spectrum and photon energieshttp://labman.phys.utk.edu/phys222core/modules/m6/The%20EM%20spectrum.htmlGravitational Lensinghttp://andybohn.com/research/lensing.htmlAsk an Astrophysicist on gamma ray scattering and energies in cosmologyhttp://teacherlink.ed.usu.edu/tlnasa/reference/imaginedvd/files/imagine/docs/askastro/answers/970412e.htmlMeasuring Vacuum Polarisation with High Power Lasershttps://arxiv.org/pdf/1510.08456.pdfDetecting vacuum birefringence with X-ray free electron lasers and high-power optical lasershttps://indico.desy.de/indico/event/12654/session/2/contribution/8/material/slides/0.pdfVacuum birefringence in the head-on collision of XFEL and optical high-intensity laser pulseshttps://arxiv.org/pdf/1807.03302.pdfATLAS makes first direct detection of Light-by-light scattering at the LHChttps://atlas.cern/updates/press-statement/atlas-sees-first-direct-evidence-light-light-scattering-high-energyTwo Photon Physicshttp://www.hep.ucl.ac.uk/opal/gammagamma/gg-tutorial.htmlhttps://en.wikipedia.org/wiki/Two-photonphysicsThesis: The Opacity of the Universe for high and very high energy -rayshttp://inspirehep.net/record/1254304/files/desy-thesis-13-033.pdfMinutePhysics is on twitter - @minutephysicsAnd facebook - http://facebook.com/minutephysicsAnd Google+ (does anyone use this any more?) - http://bit.ly/qzEwc6Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!Created by Henry Reich