10 years ago
Tractor beam breaks distance record
Scientists have created a tractor beam that can drag objects for distances of up to 20cm - around 100 times further than in previous experiments. The doughnut-shaped laser is also reversible - so it can either repel or attract objects. In future, these beams could be used to study atmospheric pollutants, or to retrieve delicate particles of material for examination.
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http://www.bbc.com
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