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 ...

The blue laser light was directed at one side of the ruby, where it passed through and cast a cool glow upon a screen, while a narrow beam of green laser light passed perpendicular to the first ...

WASHINGTON - Can light itself cast a shadow? It may sound like a philosophical riddle, but researchers have found that under certain conditions, a ...