Reply To: Error in text re magnetic fields going through iron
You have discovered and brought our attention to an error. Thanks “knitgrl”. On testing this further, you are quite right. I too find that the magnetic field extends through the can and attracts a paper clip on the other side. The attraction, I estimate, is only somewhat weaker than in the absence of the can’s “short-circuit”.
The science lesson is that what is observed will trump what it says in the text. Bernie Nebel
BTW, I think your horseshoe magnet is fine. I have never seen or heard of a magnet constructed as you describe.