Do Photons Cast Shadows?

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Thanks to Nebula for their support. Go to https://nebula.tv/minutephysics to get Nebula! Support MinutePhysics on Patreon! http://www.patreon.com/minutephysics Link 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. 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 Po

Published 2019-11-06 · Watch on YouTube ↗
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