Researchers have found that under certain conditions, a laser beam can act like an opaque object and cast a shadow, opening new possibilities for technologies that could use a laser beam to control ...

When the invisible laser beam creating them moves, the plasma is formed in a new location, creating the illusion that a single object has moved. Thus, these "objects" can literally be considered to ...

For the experiment, a high-power green laser was directed through ruby cube and illuminated with a blue laser from the side. The green laser increases the optical absorption of the blue illuminating ...