Search PBS Space Time


2021-01-26: Is Dark Matter Made of Particles?

  • 13:46: In the process of answering that we explored the ladder paradox and the twin paradox, and that's what our questions are about today.

2021-01-19: Can We Break the Universe?

  • 03:13: However the resolution requires us to think about two much more famous paradoxes in relativity - the twin paradox and the ladder paradox.
  • 08:22: This is the famous ladder paradox.
  • 09:12: The solution to the ladder paradox also relies on the relativity of simultaneity.
  • 10:54: This is a variant of the ladder paradox, but here the doors of the barn map to each other, pacman style.
2 result(s) shown.