The fact that light carries both linear and angular momentum is well-known to physicists. One application of the linear momentum of light is for optical tweezers, in which the refraction of a ...

If a is any particle and this particle has no attributes other than linear and angular momentum (which include energy and spin), then a is its own anti-particle--one of the constituents of antimatter.

Renowned physicist Stephen Hawking believes the recently discovered Higgs boson, also known as the "God particle," has the potential to unravel the universe, at least theoretically, as he writes ...