Researchers have developed algorithms that reconstruct a hidden image from the scrambled light waves that bounce off a wall, making it possible to see things behind a corner ...

One complication is that you must raster-scan the wall with the laser to form a 3-D image. Say, for instance, there’s a hidden person around the corner. “Then light from a particular point on the head ...

But if a person is standing in front of a colored wall, for example, she can't see anything around a corner, because the ... were able to reconstruct an image of the object they were trying ...