Converting Energy to Mass
Most recent answer: 03/20/2016
- Frank Wills (age 30)
We say that the mass of a particle increases as it approaches the speed of light because its inertia increases as it gets harder and harder to accelerate it further. Also its contribution to gravitational fields goes up.More particles are not being added to it. In the rest frame of the particle, its mass does not change.
We generate new particles (typically particle/antiparticle pairs) by colliding highly energetic particles; some of their kinetic energy is thereby converted to rest mass energies of the new particles. This is done routinely in particle accelerators like the one at CERN. But the process is very inefficient.
for more background, we suggest: https://van.physics.illinois.edu/qa/listing.php?id=16351
(published on 03/20/2016)