All this stuff they've explained is standard university material, but too hard to cram into kids' heads at school.
Its good to know that non-physics people find it interesting when they are presented with top-end physics and think about it for a while! It makes me proud to be studying physics...
There is the Casimir effect. That could be a 5th force. It happens when two plates very close together disturb the vacuum energy and move together... or something.
I'm revising for an exam on particle physics and understand the lot, however I'd like clarification on the calculation of lifetimes of particles.
I understand that particles decaying by the strong interaction last roughly 10^-23s because that is the minimum time that information can cross a...