303 | AMA | February 2025

12884.051 - 12907.005 Sean Carroll

But that temperature is so extraordinarily, incredibly low, the wavelength of a typical photon that is observed, that is being measured, is as big as the universe. So if you're confined to a tiny little region of space, you're never going to detect those photons. To you, it's going to look like empty space. So there is some commonality in all these different notions of vacuum state.