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A variation on the tractor beam is the '''Pressor Beam''', which applies a repulsive force on an object it is targeted at to push it away.
A variation on the tractor beam is the '''Pressor Beam''', which applies a repulsive force on an object it is targeted at to push it away.
The concept of tractor and pressor beams was popularized in the ''Lensman'' novels written by E.E. "Doc" Smith. <ref>http://www.daviddarling.info/encyclopedia/T/tractor_beam.html</ref>
The concept of tractor and pressor beams was popularized in the ''Lensman'' novels written by E.E. "Doc" Smith.<ref>http://www.daviddarling.info/encyclopedia/T/tractor_beam.html</ref>
==References==
==References==
<small><references /><small>
<small><references /><small>
[[Category: Science fiction]]
[[Category:Science fiction]]