alt Hacker News> Blocked? No. Greatly attenuated and restricted in what modes can be accommodated? Yes.
Can you give me some examples? I guess I'm thinking lead barriers or a Bose Einstein condensate but curious what you mean here.
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EA-3167 • today at 1:55 AM
Casimir plates are a good example, although Faraday cages are probably better known along with Mu-metal.
Your house has walls to attenuate photons.