Tachyons travel faster than light, so do they go backward in time? Well, maybe, but they probably don't exist. Here's why. Watch this video ad-free on Nebula: https://nebula.tv/videos/scienceasylum-the-problem-with-faster-than-light-particles-tachyons-explained Nick Lucid - Host, Writer, Editor, Animator Em Lucid - Producer ________________________________ VIDEO ANNOTATIONS/CARDS 4-Velocity: https://www.youtube.com/watch?v=fB8eatgkOyM Speed of Light: https://www.youtube.com/watch?v=vPi1lyAx4ws What if YOU were made of Light? https://www.youtube.com/watch?v=HU6t8QvGZmA ________________________________ RELATED YOUTUBE VIDEOS Isaac Arthur on Tachyons: https://www.youtube.com/watch?v=-CgxuW203fk ScienceVerse on Tachyons: https://www.youtube.com/watch?v=Eu1a9zXyswc https://www.youtube.com/watch?v=N2rr8aRmdcA ________________________________ SUPPORT THE SCIENCE ASYLUM Patreon: http://www.patreon.com/ScienceAsylum YouTube Membership: null Sign-Up for Nebula: https://go.nebula.tv/scienceasylum Advanced Theoretical Physics (Paperback): http://www.lulu.com/shop/nick-lucid/advanced-theoretical-physics-a-historical-perspective/paperback/product-24250687.html Advanced Theoretical Physics (eBook): https://gumroad.com/l/ubSc Merchandise: http://shop.spreadshirt.com/scienceasylum/ ________________________________ HUGE THANK YOU TO THESE SUPPORTERS Asylum Counselors: Richard Senegor Asylum Orderlies: Chloë Joan López, Dhruv Singhal, James Smith, Joel Wolhendler, Medec Hurtz, Peter Engrav Einsteinium Crazies: Benjamin Sharef, Eoin O'Sullivan, Jonathan Lima, Joseph Salomone, Kevin Flanagan, Matias Cveczilberg, Sean K, Sheila Owen, YouTubeviewer2014 Plutonium Crazies: Al Davis, Compuart, Dan Sullivan, Ellis Hall, Fabio Manzini, Kevin MacLean, Rex_zane, Rick Myers, Vid Icarus Platinum Crazies: Cesar Moya, Clayton Bruckert, David Johnston, Ishay Oz, Jonathan Reel, Joshua Gallagher, Li-Ce Hu, Marino Hernandez, Mikayla Eckel Cifrese, Mr. Orn Jonasar, Olga Cooperman, P. Patrick Tukkers, Stephanie Beach, Zachary Milne ________________________________ LINKS TO COMMENTS https://www.youtube.com/watch?v=fB8eatgkOyM https://www.youtube.com/watch?v=fB8eatgkOyM https://www.youtube.com/watch?v=fB8eatgkOyM https://www.youtube.com/watch?v=fB8eatgkOyM ________________________________ TIME CODES 00:00 Intro 00:43 What is a Tachyon? 01:27 What Everyone Gets Wrong 02:28 Spacetime Basics 03:24 Velocity Angles 04:18 Infinite Speed 05:15 How to Time Travel 06:28 Spacetime Distortion 07:23 Causality isn't Broken 07:54 More Weird Stuff 08:20 Tachyons are Imaginary 08:51 Outro 09:31 Featured Comment ________________________________ Corrections: 00:56 "Lux" is actually Latin, not Greek. Oops! My bad.