‘Tractor beam’ is possible with lasers, say scientists

interns | Contributor

A laser can act as a “tractor beam”, drawing small objects back toward the laser’s source, scientists have said.

It is known that light can provide a “push”, for example in solar sails that propel spacecraft on a “wind of light”.

Now, in a paper on the Arxiv server, researchers from Hong Kong and China have calculated the conditions required to create a laser-based “pull”.

Rather than a science fiction-style weapon, however, the approach would only work over small distances.

Full Story: BBC News – ‘Tractor beam’ is possible with lasers, say scientists

Tags : electromagnetic radiation laser optics physics
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