Four-velocity in physics

Visit https://brilliant.org/scishow/ to get started learning STEM for free. The first 200 people will get 20% off their annual premium subscription and a 30-day free trial. You've probably heard the rule that you cannot travel faster than the speed of light (in a vacuum). And this is true. You may also have heard that you cannot travel precisely AT the speed of light. But this is false...because you are, in fact, ALWAYS traveling at c. Good ol' Relativity can explain why. Hosted by: Stefan Chin (he/him) ---------- Support us for $8/month on Patreon and keep SciShow going! https://www.patreon.com/scishow Or support us directly: https://complexly.com/support Join our SciShow email list to get the latest news and highlights: https://mailchi.mp/scishow/email ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Reed Spilmann, Odditeas , Garrett Galloway, Friso, DrakoEsper , Kenny Wilson, Lyndsay Brown, Jeremy Mattern, Jaap Westera, Rizwan Kassim, Harrison Mills, Jeffrey Mckishen, Matt Curls, Eric Jensen, Chris Mackey, Adam Brainard, Ash, Piya Shedden, charles george, Alex Hackman, Kevin Knupp, Chris Peters, Kevin Bealer, Jason A Saslow ---------- Looking for SciShow elsewhere on the internet? SciShow Tangents Podcast: https://scishow-tangents.simplecast.com/ TikTok: https://www.tiktok.com/@scishow Twitter: http://www.twitter.com/scishow Instagram: http://instagram.com/thescishow Facebook: http://www.facebook.com/scishow #SciShow #science #education #learning #complexly ---------- Sources: https://docs.google.com/document/u/1/d/e/2PACX-1vTMGlt8e2TPezW44m9CBCuh-LjGWCJs-1-nxGphxUgPiAr-9xbgdIr6GzkCWmGnpzZBseESbGwch3FA/pub