[freedumb2003]

>>E=mc2 — it’s a 2-edged sword.<<

If I read this article correctly, that equation may no longer be complete.

[Lonesome in Massachussets]

If I read this article correctly, that equation [E = mc²] may no longer be complete.

Yes and no. E = mc² explains mass-energy equivalence. Mass and energy are manifestation of the same physical property. Mass energy equivalence does not explain everything. The article is confusing. Photons are bosons, force carrying particles, but so are, surprisingly, W-bosons. The photons are the particles that carry the electromagnetic force, W- and Z- bosons carry the weak nuclear force (weak only in comparison to the strong nuclear force).

What they demonstrated was the conversion of photons into other particles. Particle-antiparticle annihilation (with intermediate steps to preserve energy and momentum) resulting in baryonic (particles with rest mass) conversion to photons is old hat. They went the other way and converted "massless" (having no rest mass) particles, photons, into "massive" (having rest mass) particles, W- bosons.

[Yossarian]

"e=mc²" has always been the incomplete form of the actual equation.

In reality, it's always been:

1. For particles with mass (not photons!) and for speeds below the speed of light,
   E = γmc²
   where γ = 1 / √(1 - (v/c)²)
   where v = velocity relative to you, c = speed of light
    
2. For all particles, at all speeds,
   E² = (mc²)² + (pc)²
   where p = momentum

Sorry, my HTML formulas stink...