Difference Between Magnetism and Gravity | Difference Between | Magnetism vs Gravity
I presume you're asking whether just classical gravity & classical EM can be unified Classical General Relativity and Classical Electromagnetism are unified in. Gravitational forces are the forces of attaraction between two bodies due to Magnetic force is experienced when two magnetic materials are. Gravity is so weak at the atomic and subatomic level because the masses of atoms and subatomic particles are so small. It is strong on the.
The degree to which magnetism is expressed in a material is largely dependent on the electronic configuration of its constituent atoms. More the number of unpaired electrons in an atom, more is the probability of the atom showing magnetism.
Every atom of the material is a small magnet. In most materials, these small magnets are aligned in such a way, that they cancel each other out. In some ferromagnetic materials like iron, these small atomic magnets tend to be well aligned in the same direction, giving rise to pronounced tendency to be magnetized. All conductors with an electric current flowing through them, have a magnetic field around them, making them 'electromagnets'.
Magnets are used in countless electronic gadgets like audio speakers, doorbells, computer hard drives and in the construction of 'Magnetic Levitation Maglev trains'. Most importantly, electric power generation is made possible by the giant magnets placed inside power plant dynamos.
After that brief overview of magnetism, let us move over to gravity.
Myths of Physics: 2. Gravity Is Much Weaker Than Electromagnetism | HuffPost
According to the now discarded Newtonian theory, gravity is the universal force of attraction felt by every piece of matter, exerted by other forces of matter. Newton's law of gravitation states that every particle of matter gets attracted to every other piece of matter by a force which is directly proportional to the masses of the two particles and inversely proportional to the square of the distance between them. Though Newton's theory has been tested experimentally and can successfully predict macroscopic movement of satellites and planets quite accurately, it does not confirm with the special theory of relativity, which defines the structure of space time.
Einstein provided an alternative which effectively demolished the old Newtonian idea of gravity as an 'action at a distance' force and replaced it with an entirely new paradigm.
Gravity is no longer recognized as a force! What we feel as a gravitational force is the result of the curvature of space time induced by the presence of matter in it. Space time itself bends because of the presence of matter and it influences the trajectories of 'free falling' particles within it!
It is not possible to explain the 'General Theory of Relativity' here, but that's the central idea of gravity which it presents. For a better understanding, refer to the marvelous book by Bernard Schutz, titled 'Gravity from the Ground Up: Gravity So, how are magnetism and gravity different?
For starters, magnetism is affected by the electronic configuration or charge of atoms, while gravity is independent of charge. All objects that have a mass, feel the tug of gravity, irrespective of whether they are charged or uncharged. Magnetism may cause objects to be attracted or repelled from each other, while gravity only works as an attractive force.
The attraction or repulsion of magnetic field is dependent on 'poles', while gravity has no preferences to charge or poles. The only property of matter that qualifies it to be attracted by gravitational force is its mass. Magnetism is a property of matter, while according to general theory of relativity, gravity is the property of space time itself.
I don't know if I have a question per say, rather an offer of opinion as to why people, like myself, wonder if gravity and magnetism are related. Lately I have been wondering a lot about gravity and that led me to think about magnetism mainly due to them both being an invisible but measurable force. It's the invisible part.
We can measure and describe the forces through mathematics, but it doesn't really explain them. I suppose a lot of people struggle with this same question since there are only theories out there as to why forces like gravity occur. Am I wrong in the thinking that we can describe these forces, but are not yet able to explain them? Thanks for the thoughtful comments, which help go some way toward understanding this psychological puzzle.
Maybe that's somehow because we usually have to do something active to generate the charge separation, and it usually doesn't persist very long. When you get a little deeper all of physics becomes mathematical expressions. The distinction between "describe" and "explain" fades away. Maybe because gravity and magnetism take rather simple mathematical forms on the scale that we can see, they offer the first glimpse of this beautiful but disconcerting property of the universe.
I have to admit that once explanations are provided in math equations, I get lost. It always feels like the math explains the what happens, but not the how. I'm always left not understanding the how.
Like how does gravity pull, what exactly is it pulling?
Magnetism Vs. Gravity
What is magnetism actually pushing and pulling? What are these tiny invisible strings of the universe that push and pull against everything. Things are often described as a force, but that seems like such a hollow term that doesn't really tell you what it is. All you know is it pushes and pulls, but doesn't tell you how, or atleast I'm not understanding how.
Magnetism Vs. Gravity
I want to imagine magnetism like a hose spraying water out of one end, and sucking it in the other. If you get caught in the flow water it will push or pull you depending on what end you're on.
For a magnet, I don't know what the "water" is. Is it electrons, some other particle that is moving and running into things? I want to understand what exactly these forces are, not just what they do. Dear Nate, You're puzzling about some of the very things that physicists are puzzling about.
Understanding the exact mechanisms by which gravity, electromagnetism and other physical phenomena manifest themselves is exactly what physicists try to do. As humans we start from a high level concept or observation for instance, seeing an apple fall and slowly work our way to more fundamental understanding by studying the physical phenomena we're interested in in this case, gravity.
Newton took more than a few steps in that direction when he described the physical law of gravitational force. However, for centuries, people like you and me wondered "why? Why this law of gravitation? Where does this come from? Einstein took a couple of more steps with his enlightening discovery of general relativity.
The "why" of Newton's gravity was answered with this new understanding that mass curves spacetime, objects travel on geodesics and the speed of light is the same in to any observer among other things. But now there are plenty of "why's" associated with Einstein's theory!
As Mike said, "how" and "why" "describe" vs. In fact, I would challenge you to find a difference between the two when talking about physical phenomena! Asking "how" a physical phenomenon manifests itself will inevitably lead to a more fundamental understanding of it. The most rigorous, specific, and efficient way to explain the "how" is through mathematics pure symbolic logic. The alternative, describing things with words, fails sooner or later.
While in many cases describing physical concepts with words can be extremely helpful since for most people it provides for a better intuitive understanding about the topic at handit will always be subject to the ambiguity of the language and many times will produce only partially accurate analogies.
In short, there is no perfect way to describe things with words. Mathematics, on the other hand, allows us to be precise. In fact, you can think of mathematics as being analogous to a language like English. The reason we usually prefer things to be explained with words is because our language is, to us, the most familiar way to communicate ideas.
While Mathematics might seem like an unfamiliar foreign language at times, it is by definition the most precise way to communicate ideas. You asked a few specific questions about magnetism and what exactly force means.
- Difference Between Magnetism and Gravity
- On Unification
- Myths of Physics: 2. Gravity Is Much Weaker Than Electromagnetism
Let's start with magnetism: If you think of a loop of wire with a current running through it, the magnetic field exerts a force on the moving charges in the loop in a direction perpendicular to the path of the current. You also brought up a "hose" analogy for the magnetic field.
Your understandable question can really be translated to this: You can see the explanation here: What are magnetic fields made of?
And last but not least, you asked the question "what is force? The physical quantity is measured by that change in momentum divided by the time it took to occur. So, kind of like how speed measures the change in distance over time, force measures the change in momentum over time. I hope that satisfies at least some of your curiosities. Feel free to prod us with more questions! I'll take a crack at this too, in parallel with John's answer, since these philosophy issues aren't cut-and-dried.
We seem to accept certain types of interactions strings pulling, hands pushing, These are interactions where the visible objects involved touch, i. This feeling is captured in your language: When you think enough about it, though, such interactions are no more or less mysterious or explained than other interactions, such as between the earth and moon or between two magnets. On a small enough scale, all of our descriptions turn into patterns of mathematical fields filling space- even those strings, and hands, etc.
So our role here is in one way like what you're looking for- to eliminate the dualism between the familiar contact forces and the more abstract field-based forces.
Unfortunately it's by converting the former into the latter, not vice-versa. If gravity and magnetism are not the same then why do they correlate to each other.
If one acts on the other and vise verse then they must be connected. Gravity is a force acting on an object with mass, magnetism is a force exerted by virtue of charged particles. Both are based on ferrous material, one is created by mas the other by the movement of the mass.
I suspect gravity is a direct result of a magnetic field.
If there is no atmosphere like on mars then the gravitational effect is weakened. Also the larger an object is regardless of the presence of a solid core the shear mass can distort the area around the object and induce a magnetic field, this in turn creates the effect of gravity.
James- Your question is close to many others, so I've marked it as a follow-up. In addition to the original question, you may be particularly interested in follow-ups 3, 8, and Just to recap some points: Gravity acts on everything, so it's not exactly surprising that it acts a little bit on magnetic fields. It also acts on things with absolutely no magnetism. Gravity acts on everything, did I say that? There is no basis whatsoever for your other speculations about gravity and atmospheres and so forth.What is the Difference Between Gravity and Magnetism - Electro Magnetism - Physics
However, you have many co-thinkers. More philosophical questions about magnetism Q: Sorry to frustrate you with yet another repetition of earlier sentiments on this thread, but you still have not convinced me that magnetism is unrelated to gravity, undoubtedly due to my lack of scope in scientific knowledge.
However, why can't it be possible that 'magnetic' objects exhibit a greater amount of gravitational force than other objects. There are varying degrees of magnetism in magnetic bodies, and there are varying degrees of attraction in any bodies due to mass. Where do we make the distinction between a magnetic force, and a gravitational force.