facebook
twitter
rss
account
search
search
 

Scientists create tractor beam

Jan. 26, 2013 at 12:33 PM   |   Comments

ST. ANDREWS, Scotland, Jan. 26 (UPI) -- Scientists at Scotland's St. Andrews University have invented a miniature working version of a Star Trek-style "tractor beam."

The device the researchers created has the ability to pull tiny particles suspended in water towards it via a beam of light, instead of pushing them away, which normally happen, The Daily Telegraph reported Friday. The team published its study in the Nature Photonics journal.

Unfortunately, researchers said their device cannot be replicated on a larger scale because it would require a much more powerful laser. Researchers moved particles that were five microns wide.

Dr. Tomas Cizmar, who led the study, explained: "The problem is that this is based on the transfer of momentum between photons [light particles] and the object, and unavoidably there is also a transfer of energy. If you imagine you would like to attract a football, the amount of energy it would transfer would be huge and it would immediately burn up the football."

"We can probably go further but at some point the heating up would be a huge problem," Cizmar said.

© 2013 United Press International, Inc. All Rights Reserved. Any reproduction, republication, redistribution and/or modification of any UPI content is expressly prohibited without UPI's prior written consent.
Most Popular
1
Massive sunspot sending violent flares toward Earth Massive sunspot sending violent flares toward Earth
2
Stone tools reveal Ice Age settlement in the Andes Stone tools reveal Ice Age settlement in the Andes
3
Powerful new microscope sees cell division in real time Powerful new microscope sees cell division in real time
4
Astronomers discover worst-smelling comet in space Astronomers discover worst-smelling comet in space
5
Coal-rich Poland wants concessions in EU climate deal Coal-rich Poland wants concessions in EU climate deal
Trending News
Around the Web
x
Feedback