The Biggest Ideas in the Universe | Q&A 6 - Spacetime

The Biggest Ideas in the Universe is a series of videos where I talk informally about some of the fundamental concepts that help us understand our natural world. Exceedingly casual, not overly polished, and meant for absolutely everybody.

This is the Q&A video for Idea #6, "Spacetime." I try to explain what is meant by "photons do not experience time," and why the speed of light has the value it does.

My web page: http://www.preposterousuniverse.com/

My YouTube channel: https://www.youtube.com/c/seancarroll

Mindscape podcast: http://www.preposterousuniverse.com/podcast

The Biggest Ideas playlist: https://www.youtube.com/watch?v=HI09kat_GeI&list=PLrxfgDEc2NxZJcWcrxH3jyjUUrJlnoyzX&ab_channel=SeanCarroll

Blog posts for the series: http://www.preposterousuniverse.com/blog/category/biggest-ideas-in-the-universe/

Background image: https://www.amazon.com/Spacetime-Geometry-Introduction-General-Relativity-ebook/dp/B07T9MCTWF/

#science #physics #ideas #universe #learning #cosmology #philosophy #math #spacetime #relativity

Видео The Biggest Ideas in the Universe | Q&A 6 - Spacetime канала Sean Carroll