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Posted

I have heard and read a lot about dark matter but it seems they keep searching for actual particles, gas, or something visible or measurable even to help justify their calculations on what they believe the universe should weigh. But i havent seen anything on how you actually weigh the force of magnetism. If you put 2 magnets together and they repell, how do you determine its force and the weight of it? You magnify that to the size of planets, stars, and galaxies, then imagine the force of that, that would be an invisible force unseen and as far as I have heard, unmeasurable. I know supposedly our universe is neutral. But if u look at it as a molecule, within it can be positive and negative forces.

Posted (edited)

Electric field around charged particles diminishes with inverse-square law.

Magnetic field even quicker.

 

It's very easy to see electrically charged objects, because they're accelerating particles with opposite charge toward itself.

In neutral environment charged particle goes straight line. But in presence of charged object, charged particle is attracted or repelled from it. So path is no more straight line.

Edited by Sensei
Posted

Well yes u can see a charged particle, atleast those that we know of. But on a scale like the quantum level, or even a massive scale that we don't quite yet grasp, would you see that with telescopes? If u have 2 magnets repelling each other, can you actually see with a microscope the repelling of the magnets? And still, how do you measure the force of the attraction? If you have 4 of the same size magnets, however 2 are weak, and 2 are very strong, how could you measure the difference in their force, and the ammount of force it exerts on another? And can that be weighed? If you had 2 magnets stuck together, it would take more lbs of force to remove said magnet from the other then what it would normally if no magnetic attraction, or less if being repelled. Dark matter is said it interacts with nothing, yet it has mass. If I pass my hand between the 2 magnets, I wouldnt feel it. If you were seeing this from a distance, or on a massive scale, you wouldn't notice or see the interaction. When you take into account the countless other things interacting with each other, repelling, attracting, the forces of gravity. On a scale like that, I just believe it would be almost impossible to conceive the possibilities and endless interactions individually. We measure based on light, and what we know about the elements we see. But if u were to try and pull a planet out of its orbit, would it not weigh more because of the attraction to its star?

Posted

This is why we use mathematical models.

 

You can then predict numerically what you expect to see from your telescope. If that's not what you see you know you model is incomplete/wrong (depending on the circumstances). This is exactly what happened to discover dark matter. We looked into the skies with our telescopes and what we saw doesn't match what we model so our model is missing something. The placeholder name for that something is dark matter. Thus far any attempt to add something we know about other than non-elecromagnetic interacting mass into the models doesn't work.

Posted

If dark matter interacted electromagnetically, it would emit and absorb photons. We could see it.

 

But we don't.

Posted

I agree, to an extent. We can see its field, the outer rim, but if you were inside the field, can you see its interactions with things? We use instruments to see the interactions of earth's field and the sun's constant bombardment. However, our electromagnetic field is also thought to effect our weather patterns. We see the effects of it, but to my knowledge, don't actually see the interaction itself

Posted (edited)

I agree, to an extent. We can see its field, the outer rim, but if you were inside the field, can you see its interactions with things? We use instruments to see the interactions of earth's field and the sun's constant bombardment. However, our electromagnetic field is also thought to effect our weather patterns. We see the effects of it, but to my knowledge, don't actually see the interaction itself

In presence of magnetic field of Earth, highly accelerated charged particles, emitted by the Sun, are changing trajectories, and hitting atoms in atmosphere, and Polar Aurora is appearing.

Collision causes ionization, excitation of atom, and they release photons.

Edited by Sensei
Posted

I agree, to an extent. We can see its field, the outer rim, but if you were inside the field, can you see its interactions with things? We use instruments to see the interactions of earth's field and the sun's constant bombardment. However, our electromagnetic field is also thought to effect our weather patterns. We see the effects of it, but to my knowledge, don't actually see the interaction itself

We can literally see clouds, which means they scatter photons, which is a result of the electromagnetic interaction. We can't see dark matter, which is why it got that name.

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