Using a green laser beam, a ruby crystal, and blue light illumination, they demonstrated that light, under specific conditions, could block another light source, creating a visible shadow.

In a discovery that challenges conventional optics, scientists have managed to make a laser beam cast its own shadow—a feat previously thought impossible, as light typically passes through other ...

As well as being important for basic science, the work could have applications in laser fabrication and imaging. The light-shadow experiment began when physicists led by Raphael Akel Abrahao sent a ...