this post was submitted on 07 Aug 2023
482 points (97.6% liked)

Science Memes

11440 readers
916 users here now

Welcome to c/science_memes @ Mander.xyz!

A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.



Rules

  1. Don't throw mud. Behave like an intellectual and remember the human.
  2. Keep it rooted (on topic).
  3. No spam.
  4. Infographics welcome, get schooled.

This is a science community. We use the Dawkins definition of meme.



Research Committee

Other Mander Communities

Science and Research

Biology and Life Sciences

Physical Sciences

Humanities and Social Sciences

Practical and Applied Sciences

Memes

Miscellaneous

founded 2 years ago
MODERATORS
 
you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 58 points 1 year ago (2 children)

Can someone explain please?

[–] [email protected] 188 points 1 year ago (5 children)

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.

[–] [email protected] 26 points 1 year ago
[–] [email protected] 21 points 1 year ago (3 children)

Wow thanks. Amazing the things that are supposed to be common knowledge

[–] [email protected] 36 points 1 year ago

Definitely not common knowledge, I had to google to find out what that frequency was used for

[–] [email protected] 18 points 1 year ago (1 children)

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.

[–] [email protected] -5 points 1 year ago (1 children)

This is electrical engineering deletion. HAMS don't know shit anyway.

[–] [email protected] 9 points 1 year ago

I recognize all those words are English, and yet I have no idea what you’re trying to say

[–] [email protected] 7 points 1 year ago
[–] [email protected] 11 points 1 year ago* (last edited 1 year ago)

It wouldn't actually generate any useable electric fields without a coil of wire. Then you'd have a shitty magneto.

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

Thank you so much!

[–] [email protected] 3 points 1 year ago (1 children)

I am going to assume this is an amendment to the original law. Because GPS didn't exist in 1934.

[–] [email protected] 1 points 1 year ago

No it was there from the beginning, they were people of great forethought you see

[–] [email protected] 29 points 1 year ago (2 children)

The magnets spinning at that speed creates a frequency which can interfere with other radio signals.

[–] [email protected] 10 points 1 year ago (1 children)

⠀⠀⠀⠀⠀⠀⠀⢀⡔⠋⢉⠩⡉⠛⠛⠛⠉⣉⣉⠒⠒⡦⣄⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⠀⢀⠎⠀⠀⠠⢃⣉⣀⡀⠂⠀⠀⠄⠀⠀⠀⠀⢱⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⡰⠟⣀⢀⣒⠐⠛⡛⠳⢭⠆⠀⠤⡶⠿⠛⠂⠀⢈⠳⡀⠀⠀⠀⠀ ⠀⠀⠀⠀⢸⢈⢘⢠⡶⢬⣉⠉⠀⠀⡤⠄⠀⠀⠣⣄⠐⠚⣍⠁⢘⡇⠀⠀⠀⠀ ⠀⠀⠀⠀⠈⢫⡊⠀⠹⡦⢼⣍⠓⢲⠥⢍⣁⣒⣊⣀⡬⢴⢿⠈⡜⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⠀⠹⡄⠀⠘⢾⡉⠙⡿⠶⢤⣷⣤⣧⣤⣷⣾⣿⠀⡇⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⠀⠀⠘⠦⡠⢀⠍⡒⠧⢄⣀⣁⣀⣏⣽⣹⠽⠊⠀⡇⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠑⠪⢔⡁⠦⠀⢀⡤⠤⠤⠄⠀⠠⠀⡇⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠑⠲⠤⠤⣀⣀⣀⣀⣀⠔⠁

[–] [email protected] 15 points 1 year ago

my dude single handedly collapsing all the superpositions of all the cookie jars

[–] [email protected] -1 points 1 year ago (2 children)

Does it tho? It's basically an electric generator

[–] [email protected] 16 points 1 year ago (3 children)

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.

[–] [email protected] 7 points 1 year ago* (last edited 1 year ago) (2 children)

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.

[–] [email protected] 1 points 1 year ago (1 children)

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?

[–] [email protected] 5 points 1 year ago

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.

[–] [email protected] 4 points 1 year ago (1 children)

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.

[–] [email protected] 0 points 1 year ago

Please describe "as if I'm 5yo" how a radio broadcasting antenna works? Thanks! =)

[–] [email protected] 3 points 1 year ago (1 children)

they require a conductor

Well I mean, he's holding it in his hand...

[–] [email protected] 2 points 1 year ago (1 children)

They mean a conducting medium like an electrolyte

[–] [email protected] 2 points 1 year ago (2 children)
[–] [email protected] 3 points 1 year ago

It's got what rotating magnets crave.

[–] [email protected] 3 points 1 year ago

More like Brawndo. It's got what you crave.

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago)

That's not how that works...

The magnets aren't being moved across conductors to induce currents.