Questions tagged [electromagnetism]
For questions involving the fundamental electromagnetic force. This includes electricity, magnetism, light, and other phenomena.
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What substance could stop a magnetic field? [closed]
I've seen in TV shows with an MRI machine that the characters are behind a glass screen, with things like computers and metal things in there. Is this something that actually blocks the magnetic field ...
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Is magnetic telepathy possible?
So I have a story about humans far off in the future on a different planet that have evolved to be more in tune with electromagnetism
and magnetism. Their technology mostly works because of magnetism. ...
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Could exoplanet with Earth's magnetic field orbiting a binary star system harbour intelligent life?
The binary stars system is comprises of a red giant with 6 solar masses and a Sun-like star, the exoplanet is orbiting in the Goldilock's zone with a molten iron core which generate a magnetic field ...
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Likelihood of a large magnetic island remaining undetected until the early 20th century
In Edgar Rice Burroughs' The Land That Time Forgot, the crew of a captured German U-Boat discovers a large island in polar waters somewhere between South America and New Zealand called Caspak. Among ...
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Death rate after EMP
At the moment, western society is heading to a economic system based on the Internet of Things, where the production and distribution of goods will be based on information collected through sensors ...
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Can a cube world have magnetic poles?
Say that you have a cuboid "planet" that can retain its shape. Can it have a cubical iron core (as opposed to the spherical one described in this question) and generate a magnetic field? Would the ...
user21719
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A planetary dynamo
Is it possible for a planet and moon to generate electricity in some way? Could a combination of magnetic fields and iron content in the crust or core produce electromagnetic induction due to the ...
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Diamagnetism for telekinesis?
My previous/first post on here was to brainstorm a means of telekinesis and pyrokinesis (even if very limited) that violates physics the least. Now I do realize that a lot of handwaving and number-...
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How might telekinesis and pyrokinesis work if they were possible?
New here! Now let me be clear: I'm well aware that telekinesis and pyrokinesis are both impossible, as I've been rudely informed on every science forum. Nonetheless, I don't just want to "make it up" ...
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Can this unique planet be colonized?
In the story I'm writing, a gas dwarf (named Eden) is discovered in a triple star system. Its atmosphere is mainly oxygen and water based, and its gravity is slightly higher than Earth's.
Unlike our ...
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What if the speed of light was not constant? [closed]
How would the laws of physics change if the speed of light was not constant and the Michaelson-Morley experiment was instead proven to be true?
Obviously relativity would not be true, but on a small ...
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How can we stop the Earth's core from freezing?
According to this, the Earth's core will be frozen 2.3 billion years from now.
Assuming humans still live on Earth, (a much smaller and inconceivably more technologically advanced population) how ...
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Would Batman's cape work with electromagnets? [closed]
I got this idea from looking at a tent pole. They have all these pieces that snap together and fit inside a cloth groove. What if I filled a cape with a bunch of those say 20 mm long with a 2 mm ...
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Is the world shift theory plausible or not? [closed]
This theory, what I call the world shift theory, states that the Earth's original orbit was solar stationary at one of its poles constantly facing the Sun, building, over time, the magnetic poles. ...
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What would happen if magnets stopped working?
I asked a similar question earlier: What would happen if electricity stopped working?. But I was also thinking about what would happen if magnets stopped working. This question is very related to what ...
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Could a planet have a core of anything other than iron?
Specifically, I was wondering if a core of magnitite or some such other magnetic metal could be a planet's core. This is in relation to my other question, found here:
Can airborne floating/flying ...
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Can there be planets with extremely strong magnetic fields?
Would it be possible for a planet with surface conditions suitable for humans landing on it to have a very strong magnetic field, with field strengths on the planet's surface similar to the surface ...
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Traveled back in time; How would one get as strong a magnet as they could?
The general concepts of electricity are actually pretty simple to grasp.
You've got a magnet
You've got copper coiled around the magnet, (or iron, or some other Ferromagnetic material)
The copper ...
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How mermaids watch news live on TV underwater if conductivity of sea water affect electromagnetic signal?
Unless of course the mermaids can use "super" low frequency like our subs, but wouldn't the quality become poor. How can the mermaids enjoy 4K quality digital TV programmes much like us without laying ...
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How would an earthlike planet be affected by continual EMPs?
Suppose there's an earth-like planet, perhaps even modern day earth itself - and at one point in time, it began to be bombarded by a continual stream of Electromagnetic Pulses.
For the sake of ...
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Effective way to recreate a magnetosphere on Mars with current technology
Our Earth and Venus each keep a thick atmosphere because of a magnetosphere.
Most terraforming scenarios of Mars involve transferring water and other gases from the ground to the atmosphere.
We now ...
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If electromagnetic waves didn't follow an inverse square law?
I was thinking of a hypothetical universe in which electromagnetic waves decrease in intensity with the distance instead of the square of the distance. What kinds of effects would that have on that ...
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How much charge would destroy the world?
Someone invents a machine that creates electrons. It takes in some electrically neutral matter, and produces electrons of equal mass.1
Let's consider two quantities of negative charge:
$q$ is the ...
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Using electromagnets in tracked vehicles
Envision: Civilian and Military vehicles where rubber wheels are not used in the far future. All vehicles are tracked instead, tank tread style.
In order to achieve greater speeds, said vehicles use ...
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"Movable" armor in space battles
Imagine in the far future that there are space battles. In this question user: m t said that in the future it would be too expensive to do stuff in space so people would focus on "offense, ...
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Stable orbit around a magnetar
I'm working on a setting for an RPG, and I'm trying to build my planet so it's unique and interesting, but also semi-plausible. My question is, could you have a planet in stable orbit around a ...
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What magnetic capability is possible?
Magneto is way over-powered, even for a mutant. With the given relation between electricity and magnetism, what could be possible? here is already study work on biomagnetism, we know the nervous ...
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Creating a stable split earth
So having read a couple of other questions on here, and postulating over this for a while, here's my question.
Is it possible to have two magnetars in a distant binary orbit, with an earthlike planet ...
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Magnetic Celestial Bodies in Orbit
What would be the effect of large magnetic celestial bodies orbiting each other?
Could a star have enough metallic content to become magnetic?
What would the effect be on magnetic planets in orbit ...
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What if we can feel magnetic field?
Suppose human being evolved a special type of sensory organ that can detect Earth's magnetic field, beside discarding compass when hiking what else can we benefit from this extrasensory gift in the ...
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Can magnetic eddy currents stop a bullet?
This is theory for a science fiction scenario. For the sake of speculation, suppose that power is not an issue.
I've done reading on eddy currents, and I know they can exert drag forces on objects ...
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Why can't we use magnets to levitate small objects like in Harry Potter or Star Wars? [closed]
In Harry Potter there is a spell which allows a person to levitate an object at will around a room. In Star Wars, Jedi mind control allows you to do the same thing. I'm surprised that no one has tried ...
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Magnetic Based Lifeforms
It's typically regarded that life needs liquids of some kind to evolve.
But liquid is just a state where molecules can move around freely in order to interact with other molecules instead of being ...
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Magnetism-based weaponry
I remember seeing a show on the Science or Discovery channel about a certain type of star, maybe a magnetar, with a powerful magnetic field that would twist and wind over time. Eventually, the field ...
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Would my compass still work?
Imagine a world with a very wacky magnetic field, the magnetic poles are not aligned at the top of the axial tilt and the sun is active enough to cause huge northern lights each night.
I know ...
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What Effect Does Moving the Magnetic Poles of a Planet Have?
On Earth the planet's magnetic poles line up fairly well with the geographic poles. This makes things like navigation very straightforward as all compasses point to (roughly) the north pole.
However ...
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