From FlipTanedo https://twitter.com/FlipTanedo on Twitter: Drop a proton and neutron. The p is an accelerated charge: it radiates, and thus falls more slowly than the n. However, relativity says this scenario should be equal to two stationary charges in an accelerated frame (no radiation). What gives? Solution: https://en.wikipedia.org/wiki/Paradox_of_radiation_of_charged_particles_in_a_gravitational_field https://twitter.com/FlipTanedo/status/1191498209002049537/photo/1 https://chirp.cooleysekula.net/attachment/62122