and since, both \(e^{+iwt}\) and \(e^{-iwt}\) are admissible solutions to radio wave, a radio wave travels back in time, \(e^{+iwt}\) in addition to one that travels forward, \(e^{-iwt}\) in time. We may listen to the future by multiplying a suitable phase to the received signal at the antenna.
Have a nice day.
