If you’ve ever witnessed an aeroplane accelerating to supersonic speeds, it would have been hard to miss the intense burst of sound it created as it crossed the sound barrier. The discoveries of the research team could lead to new innovations in wireless communications networks and may also shed new light on a long-standing astronomical mystery. A team of researchers at Los Alamos National Laboratory led by Dr John Singleton in collaboration with Dr Andrea Schmidt, shows how polarization currents, carried by the relative displacement of charged particles within specialised antennas, can be used to generate bright bursts of light – emulating more familiar behaviours displayed by sound waves. Although Einstein’s theories place a universal speed limit on all objects in the universe, the same rules don’t necessarily apply to sequentially moving disturbances which don’t carry any mass.
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