this post was submitted on 16 Jun 2025
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Science Memes

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Hertz, showing the difference between science and engineering (lemmy.world)
submitted 1 day ago by [email protected] to c/[email protected]
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[–] [email protected] 125 points 1 day ago (19 children)

I mean, it would be some 25 years until the radio was invented. And Hertz' machine required a 30kV spark on a 2.5m meter long antenna with 2 solid 30cm zinc spheres, and his transmission range was something like "barely down the hall".

Not the most practical method.

[–] [email protected] 8 points 1 day ago (5 children)

So like Bluetooth?

[–] [email protected] 5 points 1 day ago* (last edited 1 day ago) (3 children)

Yes, except you need to buy each bit in a big glass jar.

Edit: only half joking, they used big Leiden Jars, which were basically giant glass batteries. There was no such thing as people with power at home, unless you were crazy rich

[–] [email protected] 1 points 6 hours ago (1 children)

There were electrochemical cells (invented in 1800) that provided a constant current for some time.

Idk the details. Look up Galvanic cell, Volta cell.

[–] [email protected] 1 points 6 hours ago (1 children)

Sure, but those are still "big glass jars full of electricity"

[–] [email protected] 1 points 4 hours ago

yeah, true

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