how did guys like Marconi discover or knew radio waves exists without ever seeing them?
In: Physics
People in the 1800s were already familiar with the properties of light, electricity, and magnets from work done in the 16 and 1700s. As the use of electronics spread, people also observed that electronic equipment could interfere with other electronics from some distance away, even in the apparent absence of visible light or significant magnetic fields.
The concept of light as an electromagnetic wave was developed by a physicist named James Maxwell in the 1860s, suggesting that both visible and invisible light could carry an electromagnetic field any distance.
His predictions of invisible electromagnetic “radio” waves were proven in labs a decade or so later, and then work began on using this process to transmit information.
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