A rchive Date
[ 11-01-2005 ]
Category
[ Science ]
sub-Categoy
[ Physics ]
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More weird science to ponder
Not-so-final frontiers for speculation
Marc Millis of NASA's Breakthrough Propulsion Physics Program considers how new principles could be used in powering spacecraft. The model in this image isn't anything NASA is currently considering - it was constructed by Millis himself.
Marc Millis, who manages NASA’s Breakthrough Propulsion Physics Program, says he’s more interested in ways “to propel spacecraft farther, faster, more efficiently” than in the grand cosmological questions. “And my ears perk up more when I hear about new experimental evidence than theories,” he says.
Photon tunneling
Some experiments have indicated that photons can appear to tunnel through barriers at speeds faster than light, but researchers are still sorting out the quantum physics behind such phenomena.
Faster-Than-Light
Experiments in Tunneling
Neutrino rest mass
Some experiments have come up with an imaginary number for the rest mass of neutrinos — a result so baffling that most physicists say the data must be in error. “If indeed those data are correct, then imaginary mass is a signature characteristic of a tachyon, a faster-than-light particle,” Millis says.
Neutrino Physics:Curiouser and Curiouser
Vacuum fluctuations
Quantum physics dictates that even the vacuum of space contains some energy. In fact, some physicists have said a coffee cup full of empty space contains enough energy to boil away Earth’s oceans. But can that energy be extracted or used to propel spaceships? Millis says the outlook is uncertain: “Very obviously there’s no free lunch in this scheme, but it does provide new clues from which to search for propulsion breakthroughs.”
Vacuum Fluctuations of Quantum Physics |
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