- I want to know what happens as a magnetic field passes through iron.
I know that iron is typically used in electromagnets to create a stronger magnetic field. But what is the exact nature in which that happens? When it goes in is it slowed down at all while traveling through the metal or does it still keep going at the speed of causality? Also does it have the reverse polarity as it leaves the other side or is it the same? Finally, at lower frequencies iron reflects a return signal that cancels out the incoming magnetic wave. I learned that when I found out why they used iron shavings in the paint of stealth jets. But what are those frequencies and what is the delay? I would like to know more about this.