Now, laser tractor beam that can repel and attract objects
Now, laser tractor beam that can repel and attract objects

Scientists have built a tractor beam that can repel and attract objects, using a hollow laser beam that is bright around the edges and dark in its centre.

Now, Star Trek style `tractor beam` to attract objects

Scientists have developed a real-life "tractor beam", which uses light to attract objects, and could have medical applications by targeting and attracting individual cells.