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Physics Questions From Cheeto

Migrated topic.

Cheeto

Rising Star
I figure i will stop wasting space and just ask all my questions here.


Lately i've been reading about electromagnetic feilds, now i want to know its relationship with eletromagnetic waves/radiation. What i'm reading tells me that every EMW has an EMF, an EMF is what you pass a coil through to get electricity, photons are the EMW's. So a question i have is why can't you generate electricity with light, or better yet just anywhere by spinning a coil? Arent there EMWs/EMFs all around, are they just not strong enough? Is it possible to spin a coil in a lazer beam and generate electricity?
 
Part of the issue is that when you make a field by sending electrons through a wire you can control the shape and polarity of the field. The generated voltage (also known as Electro Motive Force EMF)is pushing the current in a specific direction. With Alternating Current it's pushed in one direction with the North pole field and the opposite with the South pole field. The voltage is only induced into the coil while the lines of force are moving through the coil such as when the field is building up or collapsing so you have to have some means of modulating the field to keep it moving in relation to the coil or move the coil as is done in most generators. Any random opposing electric/magnetic fields would tend to cancel each other out. If you just shoot a coil with a laser beam you are hitting it with the light and transferring unwanted heat to the coil. The field around the laser beam isn't concentrated, kind of like the field around a single wire. I guess you could theoretically concentrate them by conducting them through fiber optics or something but it is much easier to do with copper wire and electrons. People are generating a lot of electricity today directly from light with photo-electric cells. Hope this helps.
 
Is there anyway to create a moving magnetic feild on a poll? Threw wiring and switches, create a magnetic feild that moves up and down the poll, like when you flash lights in a row to make it appear one light is moving, flash coils in a row to create a moving magnetic feild going up and down on a poll inside a coil. Is it possible to generate electricity that way?
 
I wounder if this could work?


Imagine having a coil on a non-conduction hollow poll, rather than the normal method of wraping coil, this one starts at the top of the poll, instead of wraping down the poll, continue to wrap the coil around itslelf to make a spirial disk then add a thin conducting plate, then cross over it and start a new coil disk.

The whole purpose of the is to get it where you can higlight(With current) 1 inch of coil out of say 6 inches. Have a control box that keeps an inch of poll magnetic, moving it by killing one spiral disk of power and lighting another.

It sounds crasy maybe, the way i'm explaining, but hopefully you can see what i'm getting at and help me with the question.

Could you produce electricity by bounceing a magnetic feild up and down a coil threw a switch box rather than having moving parts>?
 
I'm not sure exactly what you are saying. It would be possible to move magnetic fields along a pole. It can be a little confusing because the word "pole" is also used to indicate a coil in a motor where a magnetic field is induced. MagLev trains use magnets to raise and propel the train by moving the poles along the track so that the magnetic field opposes the corresponding magnetic field on the train pushing it along. In a motor you do the same kind of thing changing whether a pole has a North or a South field so that opposite fields attract each other and same polarity fields oppose each other making the rotor turn. There are semi-conductor switches now that do not have moving parts and they are getting where they are able to conduct a considerable amount of current but not as much as is possible with standard switches though.
 
When i was sayin poll i meant souly as a poll, as a stick can be a poll, just a long cylinder made from non-conducting material with a coil wraped around it.

To make it more simple about what i'm asking think of a row of 12 lights. Now there is a control box that sends current to one light, cuts it off and turns on the next light, to make it appear one light is on and moving. Imagine it vertical, and the light with aid of the control box bounces up and down the poll(Row of lights).

Now think of it like this, replace the lights with a magnetic feild, we both know how to make one so don't worry about how its made, just the fact that its a magnetic feild moving because of a control box turning on and off sections of coil. Thats what i mean by bouncing a magnetic feild up and down a poll, just as i would say in the light example that the (on)light was bouncing up and down a row of 12 lights.

My question is could you generate electricity by bouncing a magnetic feild up and down a poll instead of having a electromagnet that spins? Basicly to simulate a moving magnet without the magnet, because the feild is all you need, and if can be in motion by a control box with switches rather than actual kinetic energy being used to create motion.

I know it would have to be done good, so its like a smooth move instead of skiping its way down, because the magnetic feild has to build up or build down to generate electricity. Maybe you could never get it fluid enough, but maybe there is a way? I think i actually answered myself, yes i would work IF you could get it to simulate smooth movement of the feild.




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I don't think it's goanna work. Maybe I'm mistaken but I thought you generate electricity when the magnetic field is in motion.

Your device will only have static magnetic fields that blink on and off discreetly.

idk though, it's been a long time since I had me physics.
 
What if you had a coil wraped as i explained and send a short but strong pulse of electricity through it, so it travels like a ball threw a pipe, Highlighting only a small section of coil as it moves down. Electricity does travel like that dosen't it, direct current anayway?

Can you cut on power and quickly off and have a packet of electrons travel to the ground without being connected to the power source, like shooting a bullet, once the bullet(Electron) is out of the gun(battery) it continues to travel to the ground(ground)??


I'm taking my best guess and saying no it does not travel that way, it travels in the same sence as air pressure, meaning it has to build up, you cant just send one ball of air pressure.
 
deedle-doo said:
I don't think it's goanna work. Maybe I'm mistaken but I thought you generate electricity when the magnetic field is in motion.

Your device will only have static magnetic fields that blink on and off discreetly.

idk though, it's been a long time since I had me physics.


that is what creates power, motion of the magnetic field. I'm trying to think of a way to simulate the motion, or to move the magnetic feild without moving the object. And basicly seeing if anyone else could think of a way to make it work
 
In AC current, if the electrons are moving back and forth in a saw motion how do the other electrons get there energy to the device?

Each electron has a charge, so say its a battery. Now i've got a line of battereys, ....wait


Do electrons grouped together share there cahrges?? Like say if you use some energy from one electron in a group will the electrons balance themselfs so they all have an equal charge?? Or do the actual electrons get used up, can you destroy an electron?
 
Another crazy question.

Ok, both a photon and electron create the same feilds(Electromagnetic), maybe at a different vibration though, not sure. Say you have a stream of photons traveling straight and you have a copper wire in the middle of the photon stream, so the light travels down the wire. Now each photon is producing a electromagnetic feild/wave that would wave along the wire, could the wire bick up any current, even the slightist amount? Probly not, but let me see what someone else says.





I would like to find out more about how in solar power, how the photon actually gets converted to an electron, i've read it many times, just don't understand some of it. What i do understand if the photon travels threw the material, if the photon has a chage near the charge of the electron in the material then the photon converts to an electron and sits in the (spot for an electron?), if there is a path to travel on it travels, if not it fades out. If the photon has any other charge it only produces heat.


Now, in the material the is a spot for an electron, but thats not what actually converts it into an electron, how does the photon become an electron or heat.
 
Cheeto said:
I would like to find out more about how in solar power, how the photon actually gets converted to an electron, i've read it many times, just don't understand some of it. What i do understand if the photon travels threw the material, if the photon has a chage near the charge of the electron in the material then the photon converts to an electron and sits in the (spot for an electron?), if there is a path to travel on it travels, if not it fades out. If the photon has any other charge it only produces heat.


Now, in the material the is a spot for an electron, but thats not what actually converts it into an electron, how does the photon become an electron or heat.

You are not making new electrons. No photons are being converted to electrons.

Electrons in atoms will have certain discreet energy levels. An electron in an atom can absorb a photon and get jacked up into a higher energy level. (these energy levels are quantized, they cannot change continously.)

Sometimes, the electron will shed this 'extra' energy and fall back to its original energy level. This extra energy can spread through the rest of the material as vibrational energy (heat) or it can re-emit as a lower energy photon (fluorescence). It all depends on the properties of the atoms housing the electrons.

If you raise the electrons energy level just right in a semiconducting crystal you can free it. It is then free to flow through a circuit and do work. Note that you are not creating or destroying electrons, you are simply elevating their energy to knock them out of a crystal, allowing them to flow through a circuit and do work.
 
What about a free electron, not housed by an atom, if it colides with a photon does it still jack its energy up?


ahhh, i see, thanx for the help.

Quote"(these energy levels are quantized, they cannot change continously)"

What exacly do you mean here?
 
Are photons the only subatomic particals that have a frequency scale, or actually do all subatomic particals all share the same frequncy scale?(radio waves to gamma rays: Electromagnetic Wave/Feild)



They say quarks can not be found alone, only in hardrons, so how are quarks brought into existence, is there a way to make hardrons and as you make them they contain quarks?
 
Cheeto said:
What about a free electron, not housed by an atom, if it colides with a photon does it still jack its energy up?

Yes but it will be different. A free electron wave will have its wavelength shortened by absorbing a photon.

Cheeto said:
Quote"(these energy levels are quantized, they cannot change continously)"

What exacly do you mean here?

That there is nothing in between the energy levels. Maybe visualize it like an energy ladder. An electron can sit on the rungs of the ladder but cannot hover in between them.

As an electorn absorbs a photon is is instantly jacked into a higher energy level. It does not 'climb' up to the new energy level through infinate intermediate energy levels.
 
Cheeto said:
Are photons the only subatomic particals that have a frequency scale, or actually do all subatomic particals all share the same frequncy scale?(radio waves to gamma rays: Electromagnetic Wave/Feild)

'Frequency' is a term used to describe any wave. It just means how often the wave rises and falls. This is very intuitive when it comes to sound. High pitched sounds are high frequency, they rise and fall really rapidly. You can kinda feel this. Low pitched, low frequency sound the waves rise and fall more slowly. You can definitely feel this.

Anything moving fast enough will begin to behave like a wave. So a beam of high velocity [anything] will have a frequency. Even a beam of basketballs!

Photons are not subatomic particles. They are not necessarily parts of atoms and they are not really particles. Light is a crazy auto-propagating field. Just because it's quantized does not mean it is a particle. So a photon is a light quanta, not a light particle.

Light is so freakin cool. The more you learn about it the less you know what it is.
 
In the Photoelectric Effect on a piece of metal, when photons with a higher energy than the electrons in the atoms of the metal strike they jack up the electrons in the atoms and they are emited which gives the metal plate a positive charge. I have a few questions about this.


1) Is there any way to grab these electrons and turn them into flowing current?

2) If you can remove the electrons once emitted, what happends to the plate? How does it get its electrons back or can it? Does it just keep a positive charge forever, or can it absorb photons and replace the electrons?


Also, i'm still not quite sure whats going on here, how do you keep current flowing in this method?

The setup?

Metal plate exposed to sun light emitting photoelectrons and gaining a positive charge, i guess a wire connecting from the plate to a capicitor which gains a negative charge(I'm guessing the negative charged electrons travel here). Could someone help better explain tesla's photoelectric motor?
 
I watch a discovery show and they claimed to have an all eletric car which ran off of batterys and could travel 600 miles before needing to be recharged. Why couldn't they add solar tech to it also, so you have to charge up even less, if you don't drive alot or far, you may never have to charge up.
 
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