Is there any material that can block magnetic energy?
A superconductor, which acts like a perfect diamagnet, will prevent a magnetic field from entering its interior.
More info on your question can be found here:
So this is misleading then: http://www.physlink.com/Education/AskExperts/ae512.cfm
I don't see how, as it seems to say the same thing as ranger's answer above (but in greater depth).
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