Login / Register

Entropy and the Arrow of Time

Thanks! Share it with your friends!


You disliked this video. Thanks for the feedback!

Sorry, only registred users can create playlists.

Channel: The Royal Institution
Categories: Physics   |   Science  
 Find Related Videos  added


As we experience it, time flows in a single direction. But entropy, and its description in the second law of thermodynamics, is one of the few physical phenomena to imply an actual arrow of time.
Day 16 of our advent calendar:
Subscribe for regular science videos:

This video contains footage from our Ri Archives channel - hundreds of hours of science archive footage. Watch it here:

For the Ri archived footage, we have tried to contact any known copyright holders and believe it to be an orphan work. If you are the rights holder, would like it to be taken down, or have any more information, please get in touch at

Additional footage: Video blocks

As we experience it, time flows in a single direction. This is what we think of as the arrow of time, which stretches from the big bang to the present, and off into the future.

But our experience of time doesn’t match with most physicists’ view of it, as a dimension rather than linear path. We muse on one phenomenon that is intrinsically linked to directional time: entropy, and explore the link between the second law of thermodynamics and time itself.

The 2016 advent calendar explores the four laws of thermodynamics with a new short film each day, with explosive demonstrations, unique animations, and even a musical number. Open the calendar at

Subscribe for regular science videos:

The Ri is on Twitter:
and Facebook:
and Tumblr:
Our editorial policy:
Subscribe for the latest science videos:

Post your comment


Be the first to comment