482
Frequency Rule
(feddit.de)
Can someone explain please?
Spinning it at 1575.42 Million RPS would create a 1575.42 MHz radio wave. That specific frequency is used by the GPS - so by doing this you'd be interfering with the reception of GPS signals, which is the illegal act you'd go to jail for here.
Thanks! TIL
Wow thanks. Amazing the things that are supposed to be common knowledge
Definitely not common knowledge, I had to google to find out what that frequency was used for
The only people who would consider this common knowledge would be ham radio operators, who need to be licensed.
And even those people would probably just consider it common knowledge for people that are into ham radio.
This is electrical engineering deletion. HAMS don't know shit anyway.
I recognize all those words are English, and yet I have no idea what you’re trying to say
Says who?
It wouldn't actually generate any useable electric fields without a coil of wire. Then you'd have a shitty magneto.
Thank you so much!
I am going to assume this is an amendment to the original law. Because GPS didn't exist in 1934.
No it was there from the beginning, they were people of great forethought you see
The magnets spinning at that speed creates a frequency which can interfere with other radio signals.
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my dude single handedly collapsing all the superpositions of all the cookie jars
Does it tho? It's basically an electric generator
It wouldn't produce anything. For magnets to induce electricity they require a conductor and air isn't one, at least not a good enough one. Without electrical current, there's no voltage, nor constant or oscillating kind of current and therefore no radio frequencies. An electronic crystal and a handful of components could.
No. Electromagnetic radiation. It doesn't need a conductor. Think of it as a loop antenna except instead of a coil of wire generating the field a permanent magnet does.
An electric field is produced by any moving magnet, all a nearby conductor does is provides easily movable electrons that can flow in response to it.
So are you saying that a fidget spinner equipped with a couple of magnets and spun fast enough to generate that radio frequency can interfere with a purpose built radio broadcasting antenna set for the same (or resonant) frequency? In other terms, it will be able to radiate enough mV over the air to disrupt it?
The fast enough part is key. To generate a signal on the AM broadcast band you would have to rotate it at 800 thousands rotations per second. As for being able to interfere, radio signals are often in the microvolt/m range by the time they reach the reciver, and a strong magnet can produce a few volts in a small (10-20 turns) coil just being moved by hand. If you somehow managed to get a magnet spining at the 1575 million rotations per second as in the meme (without it disintegrating on contact with air, or getting ripped apart, or turning the air to plasma), it would produce massive amounts of field, tens of thousands of volts per meter.
GPS signals are actually especially weak, as low as 0.3 uV/m.
Electricity isn't the same as electromagnetic radiation. A varying magnetic field induces a varying electric field which radiates into space as an EM wave. See Maxwell's equations.
Please describe "as if I'm 5yo" how a radio broadcasting antenna works? Thanks! =)
they require a conductor
Well I mean, he's holding it in his hand...
They mean a conducting medium like an electrolyte
Like Gatorade?
More like Brawndo. It's got what you crave.
It's got what rotating magnets crave.
That's not how that works...
The magnets aren't being moved across conductors to induce currents.
- Double jail for violating numerous laws of physics.
Did some quick math I think the magnets would be moving at about 200,000 mi/sec if you spun it that fast.
what are u? the lightspeed police?
I want to see air ionize
Pretty sure you'd only have to spin half that fast, you'd get two magnetic cycles per rotation. Though if you flipped one of the magnets (or better yet, removed one) you'd need the 1575+ million rotations but get a stronger radiation (I think, though not positive).
this post was submitted on 07 Aug 2023
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