"Alpha Centauri is 4.3 light-years away ... "If this all works right, we can hold the beam together in space a very long distance — thousands of times the distance from Earth to the sun ...

An art installation featuring 30 laser beams in primary colors will shine from the top of the Space Needle Friday night.

Wouldn't the adjacent beam of light appear motionless? Maxwell's equations didn't seem to allow light to slow down or stop when moving through space. Einstein's answer—that light's speed is ...

Free-space optical communication, or FSO, is an interesting and easy way to transmit signals through light beams. Forget expensive lasers or commercial-grade equipment; this video by [W1VLF ...