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Questions tagged [electromagnetism]

For questions involving the fundamental electromagnetic force. This includes electricity, magnetism, light, and other phenomena.

3
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1answer
74 views

Physically based explanation for glowing geometric shapes found embedded in a city, visible only in IR [closed]

I'm looking for an explanation for the presence of large geometric luminescent formations that are found to be embedded in the infrastructure of a city. They must be esentially undetectable to the ...
9
votes
3answers
371 views

Can the Meissner effect explain very large floating structures?

James Cameron's Avatar featured floating mountains which stayed aloft due to the Meissner effect; they contained large quantities of the room-temperature superconductor unobtainium, which, due to ...
-2
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1answer
111 views

I am designing a quantum levitation gauss rifle for a novel that is powered by its own neutronium slugs. I need help with specifics [closed]

My idea us that through what can be defined as reverse tron lasers we have infinite neutronium and through an equilibrium of quantum levitation, a single massively dense object can offset its ...
3
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1answer
70 views

Electric Universe: planetary system inside a Red Star [closed]

Based on the Electric Universe physics a Red Star could harbor a planetary system within. How would life evolve taking in account that light would be almost constant in all the planets contained by ...
4
votes
1answer
108 views

How damaging would a major solar flare induced EMP event really be?

With specific attention to national electricity power grids. Some pertinent details needed to answer the question might be. What parts of the power grid get damaged by such an event How do they get ...
4
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5answers
204 views

The effects of magnetism in radio transmissions

Lets say the Earth's magnetic field was stronger without specifying how much stronger. How would have this affected the development of radio transmissions? Would a much stronger field completely ...
5
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3answers
601 views

How would an EMP affect spacesuits (and small-arms weapons)?

Since most online and media depictions of EMPs run the gamut from devastating annihilation (complete with sparks shooting from every angle) to gentle shutdowns resulting in inconvenient repairs, what'...
3
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1answer
195 views

Carrington Event Shield

If a nascent colony world can be wiped out by a geomagnetic storm on a scale similar to the Carrington Event, what could the colonists build either in space or on planet to protect their electronics ...
5
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3answers
154 views

Is it possible to create light emitting creatures using selective breeding?

Suppose I take a group of alligators select the ones that emit the highest frequency of radiation (since all living creatures emit thermal radiation), and I breed those, and get rid of the rest and ...
26
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14answers
4k views

How to prevent electronic advancement beyond the early cold war era?

Here are what I wants in my world: Early generation of computer with a bulky size and very limited capability, like the text-based computer in Fallout universe. Limited guidance and detection system. ...
11
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7answers
4k views

What size EMP device would be necessary to wipe all data in a Google-sized server farm, without major physical damage?

I'm not sure if it's even feasible, but I have a server farm in my book, of a size that puts it on par with Google's. I want to wipe out all the data stored on the hard drives, without destroying the ...
3
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2answers
202 views

Landing Pad Using Lenz's Law

In my universe technology is advanced enough to have non-jet and non-rocket booster technology. For a disc shaped UFO all of the technology is crammed in the ship and there was no more room left for ...
3
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6answers
326 views

Creating flying cities

Writing about suspended cities within a planet's atmosphere! The story itself focuses on the air forces that fight for each of the hundreds of floating city states living in the sky, but that's here ...
11
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2answers
195 views

Would interplanetary transmissions in the Wolf 359 star system be detectable by Earth?

Inspired by: How much electromagnetic transmission noise does Earth have to emit to be noticeable? Premise: Assume that the infamous Wolf 359 star system has one habitable planet and a second, ...
2
votes
3answers
298 views

How much electricity could an iron core moon passing over a copper deposit on a planet generate?

Assuming the moon is the same size as ours and its core is generating a magnetic field, and the copper deposits are quite large, consisting of a tectonic plate containing huge deposits of native ...
5
votes
4answers
157 views

Applications of Electromagnetism in “Force Fields”

Lengthy Explanation of Why I'm Here: TLDR; "force field" made of electromagnetic radiation. Recently, I've decided to compile a list of possible technologies available in the 22nd and 23rd centuries,...
0
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2answers
357 views

Schools of magic based around energies, not elements [closed]

The classic approach of categorising magic spells based on a variant of elemental groups a well-established trope, but has never had me particularly convinced. We're used to seeing Earth, Wind(or Air)...
3
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2answers
254 views

Could a species develop the tech necessary to land on their own moon without comprehending light?

Inspired by a brief comment converstaion found here. I would like to investigate the design and development of an alien species whose technological development did not include an understanding of ...
-3
votes
1answer
208 views

What if light didn't decay by a square law, but instead by an INVERSE square? [closed]

I want to build a character that can control a light source's brightness in different ways. I want to see if instead of proportional to $1/r^2$, my light and darkness controlling character could make ...
0
votes
1answer
62 views

How might an advanced civilization separate astronomical amounts of Magnesium Ions from astronomical amounts Oxygen Ions?

An advanced civilization collects enough Magnesium and Oxygen, from all over the Galaxy, to equal the mass of a star, and then reacts the Magnesium and Oxygen to produce Magnesium Oxide. The ...
1
vote
1answer
101 views

How might a civilization artificially keep a supermassive black hole electrically charged for the lifetime of the black hole?

A civilization creates a supermassive black hole with an electric charge such that the radius of its inner horizon is 3/4 the radius of its outer horizon. In nature, a black hole with this much ...
3
votes
2answers
516 views

Can electricity powers be used to simulate super strength and superspeed?

As I said above, in the novel I'm working on one of my characters has the ability to manipulate and control forms of electricity (or possibly electromagnetism? I'm no good with physics so I'm not sure)...
6
votes
2answers
176 views

Viability of options for super tall tower

I've been reading through other posts about such megastructures and they're getting me part of the way to my destination. Wanted to see about a few specific options my imagination has latched onto. ...
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3answers
276 views

Hand Held Hybrid Gas Expansion / Coil Guns

Would coil gas expansion hybrids hand gun be viable weapons in the near term future? I have a science fiction setting that I would like to spice up with hand held sci-fi weaponry (coil guns, plasma ...
3
votes
6answers
859 views

How can a starship be hardened against EM-based attacks

Lets assume i have a capital starship that needs to be made resistent to electro-magnetic attacks, either by a nuke' pulse or a by more direct way to "apply" EM (radiation) attacks - how could ...
7
votes
4answers
1k views

If all the iron and nickel in the inner core was transmuted into gold over two weeks

If some kind of insane wizard began a ritual that would turn the inner core of the earth into gold, what would happen? Over the course of 15 days, the entirety of the core will become gold. Each ...
5
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4answers
460 views

How would two generational ships traveling at point eight cee communicate with each other?

In my story, I have two huge generation ships racing each other to another star system. Assume they are on an exactly parallel path, neck-and-neck, about one astronomical unit apart. They are ...
-2
votes
1answer
115 views

macro level effects of a change in the value for epsilon naught

I'm developing a story set 4-5 centuries after the fall of a high-tech civilization. The fall of said civilization is indirectly related to a loss of electricity. i.e. in the chaos of their ...
-4
votes
1answer
152 views

What would happen if all the machines on Earth were destroyed by an EMP? [closed]

If all machines on planet Earth were destroyed (possibly by an extremely powerful electromagnetic pulse from an alien civilization), how large of a percent of the human population would die out? ...
6
votes
4answers
1k views

How would an EMP affect a maglev train system?

I'm looking for a description of how an EMP might affect a magnetic levitation train system that is NOT connected to the local power grid. Specifically, if the maglev was active, would the train be ...
4
votes
8answers
494 views

Using magnetic fields to prevent a weaponized warp drive?

I've been thinking of ways that an FTL-capable galaxy would prevent weaponized FTL missiles. Ignoring causality violations and paradoxes, I'm looking for a way to keep something based on an ...
4
votes
2answers
332 views

Is it possible to use a planet's magnetic field for transportation?

On a planet, a species uses magnets (i.e. float in the air) instead of wheels for transportation. Roads are easy enough, just slap some magnets in it, at it works. But I was wondering about the ...
5
votes
1answer
160 views

Creating a large electromagnetic field that prevents electronics from working

Would it be possible to create a constant EM field that disrupts electronics within it in a similar manner to the way an EMP from a nuclear blast does? Or would it be possible to have a planet where ...
-3
votes
2answers
157 views

What conditions would cause electricity to create carbon monoxide?

I've been mulling whether the local gaseous makeup of air is changed by electricity running along a wire. My previous question is on hold, and this one is different anyway. I couldn't find exactly ...
39
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20answers
9k views

Reasons why air travel isn't feasible, but ground travel is?

My story takes place on an Earth-like, inhabited world that is far larger than Earth, has roughly 110% of Earth's gravity, and has unusually high (and generally unexplained) EM emissions permeating ...
9
votes
3answers
340 views

How do passive, toggleable magnetic clamps function?

See, I'm a low-g cargo shipper by trade. We get all sorts of containers in all kinds of shapes that we need to fasten to the deck plating, and to do that we use magnetic clamps. Now, these clamps are ...
1
vote
4answers
156 views

Would using Magnetic Coil Platforms be an effective way to transport people across Solar Systems

QUESTION So recently I was doing research on Magnetic Coil based weaponry in the Halo universe, and while reading about how the "Super Mac" worked, I noticed that the theoretical speeds at which the ...
1
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2answers
165 views

How to protect against a worldwide EMP?

What are the ways to protect against EMP and can they be used to protect storage facilities, vehicles and indoor hydroponic farms ? The cause of the EMP is a meteorite crash around the same as what ...
1
vote
2answers
149 views

Is this a plausible progression of EMP-like effects?

Background: In a setting similar to Roadside Picnic, non-man-made objects termed 'emitters' produce a periodic 'zone effect' of induced current, similar in effect to an EMP. This zone effect falls ...
2
votes
5answers
201 views

Would a “perfect invisibility cloak” still be vulnerable to energy based weapons?

Let's say we have perfected a meta-material that is invisible to the complete range of electromagnetic radiation. I reckon that since light (ionizing or not) entering the material is simply being bend/...
-1
votes
1answer
118 views

How strong could the Coulomb force be made? [closed]

This is a pretty hypothetical question. I was just reading about electromagnetism and about how two charges of one coulomb could repel/attract each other at a distance of one meter with some huge ...
3
votes
2answers
146 views

What happens to asteroids when heated into a plasma?

I'm looking to build a scientifically plausible mining laser for my science fiction setting. The first approach that came to mind was a high-power laser that heats the surface asteroid until it ...
-2
votes
1answer
275 views

Fighting fire with fire: Railguns [duplicate]

In order to defeat railgun projectiles, I wish to create the Electromagnetic Reactive Armor, a defense that fights fire with fire, aka: intercepts the projectiles by shooting out another one, that ...
2
votes
4answers
305 views

How can an optical signal be converted into a mechanical/acoustic signal without using electricity?

There are several ways to directly convert acoustic/mechanic signals into optic signals (e.g. opening/closing a shutter, or the acousto-optic effect). Is there any way to do the reverse, without using ...
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votes
1answer
361 views

Could plasma “blow away” bullets? [duplicate]

I have a shield concept, however, I'm not entirely sure, if it's capable of stopping bullets. The basic concept is an enhanced version of Boeing's patent, that: The system ionizes a small portion of ...
3
votes
1answer
276 views

Preventing the dispersion of a particle-beam behind the target

Ranged plasma weapons can't work effectively, due to certain issues, so I want to replace them with their closest relatives, Neutral Particle-Beam Weapons (hereby referred to as NPBW) There would be ...
2
votes
3answers
362 views

How could you accidentally cause a global blackout?

Besides geomagnetic storms, obviously. This has to be man-made. At first I considered a HEMP, but who would've guessed nuclear weapons had so many failsafes to prevent premature detonations? So then ...
2
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4answers
271 views

Is it possible to make high voltage cables hard to detect?

The tech level is roughly comparable to contemporary. There is a loosely populated planet, where any realistic power grid system should span over continents, with on average a few thousand kilometers ...
-1
votes
3answers
213 views

Could I control plasma from a distance?

In my story, people use handheld, high-power laser rifles, however, there was a problem with the weapon's concept: Laser beams begin to cause plasma breakdown in the atmosphere at energy densities ...
6
votes
2answers
565 views

Effects of powerful superconducting rings on humans?

I recently came across this paper detailing a plan to use 12 superconducting rings around earth to strengthen our magnetic field. I'm planning on using this same idea for my own worldbuilding. An ...