Polarization when associated with electric fields?

[varunsarda88]

Can any 1 please help me out with this...i'm not able to understand the term polarization when associated with electric fields??

 

[Meir Achuz]

Acting on a dielectric, an electric field polarizes the molecules by stretching the positive charges and negaive charges in opposite directions.
This gives each molecule an electric dipole moment.
A polarization vector P is introduced that is equal to the dipole moment per unit volume.

 

[varunsarda88]

heythanx a lot..