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Electronics/Electromagnetic Waves
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Originally, people thought that radio waves – like mechanical waves – propagated through a medium the ether.
The Michelson–Morley experiment failed to show its existence.
Electromagnetic radiation (EMR) exhibits wave–particle duality.
The carrier particle of EMR Electromagnetic radiation is the photon, abbreviated with Greek letter gamma (γ).
In electronics you focus on the wave nature of EMR Electromagnetic radiation though.