What about rf engineering?
Bill Gates put stainless steel plates around, on top of and everywhere on his new mansion. Like a Gaussian sphere - you can't beam in or out = great protection from most RF as in TV, Radio, Cell phone, Mobile radio and any other low level cosmic RF.
In our RF engineering test labs we had special rooms lined with copper and with soldered seams. You could blast away and not create anything in the way of interference.
Like radiation - rf is invisible and undetectable to the naked eye. But it's still there causing problems.
"Bill Gates put stainless steel plates around, on top of and everywhere on his new mansion"
More likely to prevent electronic eavesdropping, than for health concerns.
Those rooms were there to calibrate receivers away from the ambient levels of radiation. They were not used to blast anything.
Did you mean to write "Faraday cage?"
If Gates did what you say he did, it is to prevent RF energy from leaking OUT of his complex, not in. (Think TEMPEST hardening.) IOW, he doesn't want some smart ass sitting 100yds off the shore from his mansion in a boat loaded with all sorts of sophisticated and sensitive monitoring gear that can read what is being written to his PC monitor screen, or signals sent to his PC's printer.... (or, more likely, to be able to glean info about security at the mansion)
After all, all the gear INSIDE his house is still radiating RF energy all over him, right? The cage around the house doesn't protect him from that..... But it does thwart nosey maritime RF sniffing techies from violating his cyber-privacy.
Like radiation - rf is invisible and undetectable to the naked eye. But it's still there causing problems.Hmmm ... like when nature lets loose with one of her real zingers?
Ka-pow! and there goes your static wire, the transmission class surge supressor and the potential transformer all in one shot!