Antimatter interact with massive matter through gravity.

[jweygna1]

How does antimatter interact with massive matter through gravity. Does it still attract? I know most antiparticles are stored using electromagnetic fields so we wouldn't see the effect of gravity, but have we ever just let one loose and seen if it falls to the earth?

 

[DaveC426913]

How does antimatter interact with massive matter through gravity. Does it still attract? I know most antiparticles are stored using electromagnetic fields so we wouldn't see the effect of gravity, but have we ever just let one loose and seen if it falls to the earth?

Antimatter has gravity and interacts with gravity exactly like matter does.

And, despite being stored in a magnetic bottle, we can still tell that it has weight. (A box containing a magnetic bottle that's suspending one kg of antimatter weighs one kg more than a box containing a magnetic bottle that's suspending nothing.)

 

[maverick_starstrider]

antimatter behaves in every way like normal matter in terms of gravity. They just have the opposite charge relative to the normal species (i.e. positrons have +e charge where electrons have -e charge). You may be confusing anti-matter with dark matter which are very different things. We see anti-matter all the time and, these days, there's really nothing particularly exotic about it.

 

[DaveC426913]

We see anti-matter all the time and, these days, there's really nothing particularly exotic about it.

erm... You lead a much more exciting life than most of us...

atw*:"...it would take two billion years to produce 1 gram or 1 mole of antihydrogen..."

*according to wiki