1. The problem statement 1)Do electric fields extend through a vacuum? 2)Do electric fields extend through the interior of a insulator? 3)Do electric fields extend through the interior of a conductor? I am just starting to understand electric fields but I am still very unsure, and am not sure if my thought process is right and going in the right direction. 1) YES, electric fields exist and can extend/propagate through a vacuum. Reasoning: Why not there is no difference between a vacuum and space just that a vacuum has no air in it. Vacuums are still made of matter so the electric field should still extend into that space. 2) No, A insulator is an material that does not respond to an electric field. An insulator also completely resists the flow of electric charge. Reasoning: The definition of an insulator says that they must not allow electric fields to propagate through them. 3) No, Coulomb's Law says that electrons repel so they will all be on the exterior of the conductor and Gauss Law says that the enclosed charge within that conductor will be zero so therefore there is no electric field in the conductor. Reasoning: With a zero electric field inside ALWAYS then there is in essence never a field actually there at all. Like I said I may be completely wrong on all of this! I am just learning about the properties of electric fields now. I have made my attempt to reason through the questions using facts I already have learned, but I am not sure if my answers are correct. I think they are correct but I could care less if they are correct I want to understand the correct reasoning behind WHY they are right just not that I am right. Thanks for the Help and Advice in advance.