Equivalence principle and radiation by a uniformly accelerated charge

We address the old question of whether or not a uniformly accelerated charg ed particle radiates, and consequently, if weak equivalence principle is vi olated by electrodynamics. We show that radiation has different meanings; s ome absolute, some relative. Detecting photons or electromagnetic waves is not absolute, it depends both on the electromagnetic field and on the state of motion of the antenna. An antenna used by a Rindler observer does not d etect any radiation from a uniformly accelerated co-moving charged particle . Therefore, a Rindler observer cannot decide whether or not he is in an ac celerated lab or in a gravitational field. We also discuss the general case .