So if you want a field to reach across a very long distance, it not only has to cross that distance the first time, but then it must cross the distance again on the way back. However, a solenoid is essentially just a collection of dipoles, and the field will fall off like 1/r^3 at long distances, meaning that it is very difficult (requires a great deal of current) to make it extend very far.Īlso, the main problem with your idea is that magnetic field lines must close on themselves. Of course you can put a bunch of solenoids together to focus fields, or you can send the magnetic field further out by increasing the current running in the solenoid. would be nice for a propulsion system which stay inside an object and has no need for friction or to release mass in the opposite direction in order to move.Īre you familiar with a solenoid? This is simply a device which is used to project a magnetic field in a certain direction, like you are saying. would the boat will move? - Normally in a close system all forces has a counter force. If we place that box in a toy boat and place that boat in a receipient of water.
ELECTROMAGNETIC RADIATION CANNOT BE FOCUSED FULL
I also thought, what will happen if we put that instrument attach to a box with a wall on the opposite side of the box full of magnets (north pole). I guess we could have an object lifting and idealy reaching a distance/speed far enought to be put in orbit around the earth. Having a magnetic south field beam pointing to an object with a north permanent magnets.
I was thinking of the application related with space propulsion. I wonder if we could build a mirror for an electromagnetic field in order to concentrate the field?Īssuming that we could do that kind of instrument technically. So, I thought maybe if we could concentrate the radiation into an axis like a laser do for light. in order to increase the length of the magnetic force between two magnets. In fact, I was looking for a way to reduce the exponent n=2 in Coulomb's law: F= q1q2 / (e*r^n). I subscribe to this forum, because last week I got that idea and wanted to discuss about it. Is this device outright impossible according to physics? If so, why? If not, then why haven't we made devices like these yet? Is the technology required vastly beyond what we have today? We could even use the negative and positive fields together to levitate something in the air at a distant point. A magnetic pointer (as opposed to a laser pointer) could be pointed at a distant piece of metal and either attract or repel it. Obviously, the magnetic field cannot be fired as if it were a projectile (though it can fire magnetic projectiles as seen in certain hypervelocity guns), but such a device could transmit the effect to a distant point. Magnetic field lines normally cause things to follow a loop like pattern (See plasma on the sun, iron filings on paper with a magnet beneath), but can they create a laser like effect?
ELECTROMAGNETIC RADIATION CANNOT BE FOCUSED SERIES
A series of weights transmit force through a metamaterial which focuses the sound into a "hot spot", so although magnetism may be a force rather than an "object" like a photon, can it not also be focused either onto a spot, or even made into a beam where the field lines actually come straight out of the device towards a distant point? I recently learned that we can even focus sound in a similar way (by a different process) to the focused power effect of a laser. I did a google search for "magnetic laser" (which would of course be a misnomer) and turned up nothing. I would think that the strength of two different magnets can create a focusing effect where they overlap most strongly, however I'm wondering why we can't extend these fields to distant focal points in the same fashion as a laser (or maybe more where many lasers converge on a point, creating a "hotspot")
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