According to a video shared on YouTube, a bright beam of light shone down on the pass. The beam looks almost like that of a UFO shining down on an unsuspecting victim, like what you’d see in a ...

The knot function is then embedded in a propagating light beam, with the knots forming as dark interference lines from overlapping laser modes. To experimentally realize the knots, a hologram made ...

A narrow beam of light goes farther than a wide one ... This was especially handy as I was stringing up Christmas lights in the dark and had both my hands occupied. I was able to say “Coast ...