When a dielectric slab is placed in a uniform electric field (between a capacitor) say E_o, the extreme faces of the dielectric slab get induced and the face near the positive plate of a capacitor gets negatively charged, the face near the other plate gets positively charged, the in between atoms are neutral. Okay, then the electric field inside the dielectric is E=E_o-E_p. But the induced charges on the extreme faces, will they not change the electric field between the corresponding plate and faces? I mean my sir said that the electric field between the two faces and the plates will remain E_o. How is this possible? Will the induced charges on the faces not slightly change the electric field?