Physical waves need a medium for transfer and are affected by the density and pr... | Hacker News

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		83457 on Sept 26, 2020 \| parent \| context \| favorite \| on: Serverless, peer-to-peer, local file sharing throu... Physical waves need a medium for transfer and are affected by the density and properties of the material(s) involved.

_fx6v on Sept 26, 2020 [–]

What isn’t a medium? A vacuum?

Physical waves depend on a fluid?

EM seems to be affected by a medium/fluid.

Wonder where the distinctions are more poignant. Maybe degree of affects?

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