Maybe because you're looking up the wrong terms when reading up about it. https://www.taylorfrancis.com/books/electromagnetic-fields-biology-medicine-marko-markov/10.1201/b18148
Also, if you're a man, never work with a laptop on your lap because the heat generated may kill sperm regardless of WiFi and emission of EMFs.
Wifi makes society docile because they have their dopamine receptors saturated by the constant influx of social media, not by "WiFi electromagnetic therapy".
How does one emit EMFs? By definition it's just voltage. Of course there is an electric field from a higher electric potential to lower. But how does one emit a potential?
It's terminology like if you ring a bell there is a noise emitting from it, similar to electromagnetic fields it is in a wave form and you can observe it through hearing.
Voltage is not emitted. Voltage is just a difference in potential. Like if you place a ball on a shelf, it now has a potential difference to it being on the floor.
If the voltage has frequency then that is like saying the ball is bouncing between the floor and the shelf, where its frequency is the time it takes to move from the shelf, hit the floor and return to the shelf, so the potential difference doesn't really change but the state of the ball changes... and this is similar for the electrons in electromagnetic fields with a time varying state, as potential is often a build up of electrons (or rather an absence of electrons compared with a concentration of electrons. There are other cases for photons, the positive counterpart to electrons but keep with electrons, it's simpler.)
Technically our brains and nervous system emits EMFs but they're so weak that it probably doesn't travel further than a few nano-meters outside of the nerve so one does not really emit EMFs. One does emit heat radiation which can be picked up on thermal cameras, because we are warm blooded mammals.
Laptops normally emit EMFs through a specially designed aerials that works at most efficiently at 1 frequency for transmission range and power. The aerials are normaly for WiFi or for Blu-tooth within radio frequency (generally between visual light + heat and a little above audio waves.)
For emission of electromagnetic frequencies one takes a point of potential and takes it to a high number, which takes the field surrounding it to a high number, and then dips it down to a low value, and the field surrounding also drops to a low value. Like throwing a stone in a placid pond, that stone is your initial potential which dips the potential to a low value, then the point rises to a high value and oscillates until the elasticity of the water/surface tension, gravity, and any other resistances return the surface to a state of placid.
But as the centre point is oscillating you can see the ripples emitting out from that center point, that is like how potential energy is transmitted across free-space.
Am I managing to explain this clearly?
All you've achieved explaining is that you don't know that EMF is another (antiquated) word for voltage. I think you think it stands for electromagnetic frequencies maybe? It really stands for electromotive force. But part of the reason it's antiquated is because it's a poor name, because it's not a force, but a potential.
For one to emit electromagnetic radiation at a given frequency (one doesn't emit electromagnetic frequencies like you describe, it's EM at a given frequency) one has to generate a field, and propagate it to the transmit medium (free space) by impedance matching. That's 377 ohms, and just for your own edification, is defined by the square root of the permeability (4*pi x 10-7 H/m in SI units in free space) of the medium divided by the square root of the permittivity (8.85 x 10-12 F/m in SI in free space) of the medium. The velocity of propagation is the inverse of the square root of the product of the permittivity times the permeability.
The "ripples" you describe are from the medium (free space) interacting with magnetic component of the EM field and the permeability, and the electric component of the EM field with the permittivity. The larger the relative permittivity or permeability, the shorter the wavelength or "ripple" as you call it. This is how lenses work by the way, a shortening of wavelength coupled with the shape of the medium that shortens the wavelength. You can observe this with a prism and it's different effect on light of different wavelengths (that's why they spread out into a rainbow).
Note you don't need a "ripple" at all, or more precisely you can have the wavelength of the ripple become infinitely long. That is DC and it isn't really electromagnets, it's electrostatics because EM fields are coupled through the change in one another (see Maxwell's equations) and if unchanging, they are uncoupled.
Note you mentioned traveling waves (although I doubt your realize it) but remember that's assuming the solution to the second order PDE describing the system is unbounded. If bounded you get standing waves (hence why I said earlier to broadcast you must match impedance which really means remove an impedance boundary). If the PDE is bounded by material with a different permittivity and or permeability, some of traveling wave will continue into the new medium, some will reflect and it's represented by a standing wave solution. Note that a portion will also continue into the new medium not as a traveling wave, but as an exponentially decaying wave. Finally, with all these media we've been talking about a non lossy impedance. If either the relative permittivity or permeability has an imaginary component, that translates to a resistive real component in the impedance, and the wave in the medium will decay due to energy loss to the medium (because it has either electric or magnetic conductivity). Also note there are no real magnetic charger carriers, but we can still talk about magnetic conductivity due to how media interacts with a magnetic field.
Am I managing to explain I know a lot more about this than you? I can go on...
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