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Questions tagged [electromagnetism]

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

5
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3answers
132 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
votes
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
votes
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
votes
3answers
189 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
votes
6answers
280 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
170 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
273 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
129 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
331 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)...
1
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2answers
166 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
203 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
61 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
96 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
368 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
166 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. ...
-1
votes
3answers
216 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
681 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
votes
4answers
432 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
106 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 ...
-3
votes
1answer
140 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
445 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
268 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
156 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
131 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
votes
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
295 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
151 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
vote
2answers
142 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
131 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
193 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
114 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
137 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
272 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
301 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 ...
-6
votes
1answer
297 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
249 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
324 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
votes
4answers
267 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
204 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
536 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 ...
7
votes
2answers
571 views

What are the specific effects of an EMP on electronics?

Within the next decade or two, Earth is attacked by an alien fleet. The various militaries have some forewarning and are able to destroy the attackers by launching most of their nuclear arsenal at the ...
4
votes
3answers
331 views

Selective EMP weapon

According to wikipedia, EMPs have a number of different waveforms. Radio transmitters are carefully designed with a near-perfect sine waveform so that their signals can later be filtered out by the ...
5
votes
2answers
356 views

What would a realistic plasma shield look like?

A follow-up to my previous question-barrage: Properties of magnetically confined plasma shielding After some of the feedback, I'm splitting it into several smaller questions. In the world I'm ...
4
votes
2answers
469 views

Properties of magnetically confined plasma shielding

In the setting I'm creating for a game, I've given one of the factions plasma shielding and I'm about to rewrite the code behind their shields from scratch. I wanted to revise the game mechanics to be ...
4
votes
2answers
173 views

Could a giant battery serve double duty as a sadistic acid bath?

Setting: In a fantasy setting much like World of Warcraft (where huge liberties are taken regarding the level of technological sophistication), an evil emperor rules from a castle in which there are ...
3
votes
1answer
45 views

What are short-term defenses against massive elegtromagnetic disruption?

A society comparable (in resources, technology, economics and politics) to present day Earth is gearing up for war. There is a weapon which causes massive, widespread electromagnetic disruption. Like ...
1
vote
1answer
160 views

Feasibility of this plasma cannon-Round 2 [closed]

My intention is to develop this idea through multiple phases of flaw searching, proposing possible solutions and starting it over again, until there are little to no flaws remain. the first phase of ...
1
vote
4answers
107 views

Energy Transfer Through Space Without Adverse Affects

Perpetual motion doesn't exist... or does it? In space planets continuously spin around stars for trillions of years due to inertia and gravity balancing each other out. What if a race of brilliant ...