I’m Cynthia Keppel
I’m the Hall A leader here at Jefferson Lab.
The electromagnetic force is the force that really dominates our lives.
It’s responsible for the Atoms
that hold all of us together,
hold the universe together, in fact.
It’s very common in our technology.
Electricity comes to mind.
Also, it’s the thing that’s in our body responsible for how our cells interact,
how our brain sends a signal for our muscles to contract.
So while the electromagnetic force is all around us
and we, in fact, utilize it every day,
it’s still something of a mystery. 
If you think about it,
you may know that opposites attract and likes repel.
But how does that happen?
If I have a positive charge over here,
and negative charge over here,
They’ll attract.
But how do they know the other one's there?
Much less, they know what charge the other one has.  
How do they do that, right?
So they're sending signals across 
And the kind of way that we describe it as a field of photons.
Where these are force carriers for the electromagnetic force.
So the electromagnetic force is the way 
that charged particles interact with each other.
