What is Entropy?

Entropy is a concept that threads through every aspect of physics... so what is it?

At its surface, entropy is a measure of disorder. But scratch beneath that surface and you find something that feels fundamental — a concept that connects the arrow of time to the birth of the universe, that links the information in a quantum system to the temperature of a black hole.

As the beer we're drinking comes into thermal equilibrium with its surroundings, we'll perhaps talk about:
- How to recognize low vs high entropy states
- How an entropy maximization principle led Einstein to discover the photon
- Whether gravity increases or decreases the entropy of the universe
- The black hole information paradox
- Stephen Wolfram's interpretation of the Second Law

Check out this YouTube video from Physics Explained: https://www.youtube.com/watch?v=3uJriCSlTF8

See you there!