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.

The green laser beam thus behaves like an object, blocking the blue light and casting a dark line across the screen. That dark line meets all the criteria for a shadow: it was visible by eye ...

The green laser increases the optical absorption of the blue illuminating laser beam, creating a matching region in the illuminating light and creating a darker area that appears as a shadow of ...

The laser rifle physically affects a drone by the focused ytterbium laser emission technology. The laser beam destroys the drone ... it appears that the gun was mounted to a tripod and, instead ...