The USS Portland test-fires a laser weapon. The photo captured infrared light to make the beam visible. Staff Sgt. Donald Holbert/Marine Corps via AP Nations around the world are rapidly developing ...

Laser beams, robodogs and drone-zapping microwaves, these are the types of weapons that could be deployed on battlefields in the not too distant future. Some are already here. The threat of a wider ...

There are many different types of lasers—almost as many as there are applications for the same—but what ties them all together as a class is that they depend on the same physical effect: stimulated ...

When the green laser encounters atoms along its path through the crystal, it gives the electrons in those atoms a bit of extra energy. In their high-energy state, those electrons can absorb blue light ...

Physicists are teasing a potential leap in nuclear fusion that sounds almost absurd on its face: a path to reactions that are ...

Muons are unstable subatomic particles that spontaneously and rapidly transform into other particles via a process known as ...