How to make particles refract/change direction through an object As the title states above, I want a line of particles that is produced from an emitter to go in an object and change direction, like a refracting effect. 

Any and all ideas will help. I know that these particles will be not be effected by gravity, but can be effected by other forces. 

Here is a picture to better explain my point.
you need to use keyed physics in particle system,then use a curve of your desired shape as the guide for leading the particles,here's how you do;


create a particle system,crank up the lifetime and play around with
emitter geometry.
Create a curve of desired shape.
Create another particle system at the end of the curve.
In physics tab,select Newtonian,then add keys and select the target.


Voila there you go.