Dimitriy Korolko

[Dimitriy Korolko @DKorolko]

@skdh, thought experiment: Cannon at 0.99c fires protons at 0.99c forward/backward (its frame). Relativistic sum: forward c, backward 0. In cannon’s frame, backward proton seems half photon’s speed. Target in frame: hit interval tiny, invariant, but feels wrong. Clarify? #physics