Veritasium

Misconceptions About the Universe

Can we see things travelling faster than light?
Check out Audible: http://bit.ly/AudibleVe
Music by Amarante “One Last Thing” http://bit.ly/VeAmarante
Awesome animations by http://youtube.com/minutephysics
Thanks to Prof. Geraint Lewis for input on earlier drafts of this video.

The expanding universe is a complicated place. During inflation the universe expanded faster than light, but that’s something that actually happens all the time, it’s happening right now. This doesn’t violate Einstein’s theory of relativity since nothing is moving through space faster than light, it’s just that space itself is expanding such that far away objects are receding rapidly from each other. Common sense would dictate that objects moving away from us faster than light should be invisible, but they aren’t. This is because light can travel from regions of space which are superluminal relative to us into regions that are subluminal. So our observable universe is bigger than our Hubble sphere – it’s limited by the particle horizon, the distance light could travel to us since the beginning of time as we know it.

Products You May Like

Articles You May Like

Products That Turned out to be COMPLETE LIES!
Students in Taiwan had to solve this tricky cube problem
10 Ways Your Home Can Kill You!
25 Halloween Life Hacks – mental_floss List Show Ep. 443
Rise of the Feminine Voice as the Key to Our Future | Cindy Watson | TEDxOcala

Leave a Reply

Your email address will not be published. Required fields are marked *