What is the connection between electromagnetic field and electromagnetic wave?
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There is an important law in physics which says that a moving or changing electric current produces a magnetic field. This is the reason electromagnets and motors work. The opposite is also true. A moving or changing magnetic field produces an electric current. This is the way electric generators work. If we have a high frequency alternating current moving through a conductor, as this electric field continually rises and collapses (it's alternating, remember) it produces a magnetic field at right angles to it. As this magnetic field rises and collapses it produces another electric field which in turn produces a magnetic and so on. This is a self propogating process which once started will continue moving through space forever. At sufficiently high frequency this produces a wave motion called an electromagnetic field which travels away from the conductor in all directions in ever widening circles much like moving your hand rapidly in water causes widening waves to travel on the surface. Because they travel in widening circles these waves are referred to as radiation, from the word radius which means like the spokes of a wheel. Depending on their frequency (how many times the waves rise and fall per second) we can classify many types of electromagnetic radiation such as light, radio waves, microwaves, gamma radiation..... This is a highly simplified description of what really happens and it might not satisfy some scientific purists but it works with my students. Hope it helps you.
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Gamma rays have a dual property as it consists of an electromagnetic waves .. which means they are particles and at the same time waves (like the light)
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I have the same problem, so does my father.\nI think the electromagnetic field of a person has alot to do with it.\nWe all produce electromagnetic energy,this is an actual measurable force, ex. EKG, EEG etc.\nAnd some people produce it at different wavelengths, so it stands to figure that someone is gonna screw up something with one.
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Basically photons (or light) are the particles that is exchanged in communicating the electromagnetic force. To understand the essence of electric charge then you must understand light, or EM fields. This is independent of the atom.
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Electromagnetic waves??? thats something ive never heard of before. how about posting the article or the website online? \n\ni do know that electricity can be "transmitted" by magnetism, via electromagnetic induction. according to faraday's law, a changing rate of magnetic flux linkage induces an electromotive force, and thus induces current on a conductor. check out faraday's law at wikipedia for more info dude...
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Magnetic flux and electric flux are always linked with each other.\n\nIf a magnetic flux changes in a certain region in space, a rotational electric field is produced.\n\nA varying magnetic field is inseparable from an electric field.\n\nThe division of electric fields into electric and magnetic fields is a relative matter.\n\nFrom one point there is only a magnetic field in space. From another view point in addition to the magnetic field there is an electric field. \n\nThe converse is also true.\n\nIf an observer in one system of coordinates finds only an electrical field present, then an observer in another inertial system will find that both an electrical field and magnetic field exist.
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You haven't kept up with the latest scientific\ndiscoveries.  Recently, well, in 1887, Albert\nMichelson and Edward Morley proved that no\nmedium (then called "ether" or "aether") was\nneeded for the propagation of electromagnetic\nradiation.
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Maxwell's equations (sometimes called the Maxwell equations) are the set of four equations, attributed to James Clerk Maxwell, that describe the behavior of both the electric and magnetic fields, as well as their interactions with matter.\n\nMaxwell's four equations express, respectively, how electric charges produce electric fields (Gauss' law), the experimental absence of magnetic monopoles, how currents and changing electric fields produce magnetic fields (the Ampere-Maxwell law), and how changing magnetic fields produce electric fields (Faraday's law of induction).\nfor the theory of thid equation click on the link below:\nhttp://en.wikipedia.org/wiki/Maxwell%27s_Equations\ni hope it will help you.....
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Radio frequency, or RF, refers to that portion of the electromagnetic spectrum in which electromagnetic waves can be generated by alternating current fed to an antenna
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Electrostatics is the study of static or non time varying electric fields.\n\nElectromagnetics is the more general term applied to the study of electric and magnetic force fields.  Usually most situations deal with time varying currents producing time varying magnetic fields.  Maxwell's equations show us that time varying magnetic fields produce time varying electric fields.\n\nThe rest of electromagnetics is the study of the physical properties of these force fields, how they behave in a conductor, how antennas can radiate these fields, etc.
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Light is the only thing we see with our eyes. Electromagnetic waves are light wave, of which we see a very small branch of frequency.
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The electromagnetic spectrum is the range of all possible electromagnetic radiation.\n\ngo to the site below, it has the chart
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There are two answers to this question:  one, how the waves themselves propogate and two, how the wavefront moves.  \n\nTo answer the first there are two things to remember:\n1.) a changing magnetic field creates an electric field\n2.)likewise, a changing electric field creates a magnetic field\n\nWith those two things in mind, here is how an EM wave (of which light is just one type) propogates.  A changing electric field induces a magnetic field, which induces an electric field and so on as the wave moves.  In other words one creates the other to move the disturbance along and the fields "bootstrap" themselves forward.\n\nAs to the second part, the way the wavefront moves depends on the geometry of what you're looking at.  If you imagine a source out in space, then yes you could consider the wavefront as being a sphere whose radius increases at the speed of light (for a repeated signal, then you'd have concentric spheres, one wave for each time the object sends out a pulse).  However if you restrict the wave to move in something (e.g. a waveguide, or channel)  the wave fronts would look different.\n\n\nI hope that helps
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In physics, a magnetic field is an entity produced by moving electric charges (electric currents) that exerts a force on other moving charges. (The quantum-mechanical spin of a particle produces magnetic fields and is acted on by them as though it were a current; this accounts for the fields produced by "permanent" ferromagnets.) A magnetic field is a vector field: it associates with every point in space a (pseudo-)vector that may vary in time. The direction of the field is the equilibrium direction of a compass needle placed in the field.
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If you have ever wondered how you get to see and hear. how stuff like cell phones, microwave and remote-controled toys work, you need to learn Electromagnetic Spectrum, Wavelength And Frequency to understand.\nIf you are not curious, they are not important.
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Any electromegnetic wave, be it light, electricity or x-rays, travels in a wave which has amplitude and wavelength.  For every electromagnetic wave, there is also created a magnetic wave that travels along with it.  If the light wave is going up and down, the magnetic wave will br traveling side to side.  This is the basis for the incredibly simple device, the electromagnet.  If you wind copper wire around a tube, and then pass a current through it, the electricity flows, but also creates a magnetic wave, which will be attracted to iron in the same way a regular magnet would.
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EMF can mean electromagnetic field or electromotive force. I assume you mean the former. \n\nThere are lots of uses and potential uses for microwave radar waves:\n\n1. heating food\n2. radar guns for police\n3. communications\n4. disabling electronics\n5. radar systems for planes, weather, etc\n6. crash avoidance systems for cars and trucks\n7. traffic monitoring\n8. astronomy\n9. surface mapping by satellites\n\nand so on.