- Quantum physicists definitively measure the time it takes for a particle to tunnel through a barrier. The light produced for the pulses to measure the tunneling time had 30 gigawatts of instantaneous power, which is more than the total output of the entire U.S. power grid. https://app.secure.griffith.edu.au/news/2019/03/19/measuring-tunneling-time-physicists-solve-great-mystery-of-the-quantum-world/ 22 comments science