10 Most Memorable Fictional Technologies: When Will They Be Here?

QuantumPhysics

Posts: 4,714   +5,117
Time Travel from the Present to the Past is impossible.

Time itself is moving forward and doesn't move backwards.

You are ALREADY a time traveler: You're moving from the present towards the immediate future.

The law of causality states that: "what has happened, has happened and couldn't have happened any other way".

 

QuantumPhysics

Posts: 4,714   +5,117
The problem with teleporters is energy.

What machine has enough energy to "dematerialize" a human body?

3 Billion Joules (Gigajoules) to vaporize someone.

Therefore, it would require at least 3 Billion Joules to rematerialize them.

And as they said: you're basically killing the person and copying them elsewhere.

What we really want is a wormhole technology or portal that allows you to connect two points in space and move instantaneously from one to the the next. "Einstein-Rosen bridge" (wormhole).

It should therefore be possible to move from Earth through a wormhole to any other point in the universe.

It would take the same amount of time to get from Earth to the Moon that it does to get from Earth to Kepler 22b
 
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wiyosaya

Posts: 5,783   +3,988
Personally, I think that one of the most advanced things about the TARDIS is its dimensional transcendentalism - that is - it is bigger on the inside than it is on the outside.

On another note, how about Warp Drive?
On that note, there is this recent article - https://phys.org/news/2021-03-warp-barrier-faster-than-light.html and has none of the twin paradox elements that Einstein supposed.
The concept that this article presents reminds me of how The Doctor has described the TARDIS in the past.

Edit: Meant to say bigger in the inside than it is on the outside. DOH! :)
 
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wiyosaya

Posts: 5,783   +3,988
Time Travel from the Present to the Past is impossible.

Time itself is moving forward and doesn't move backwards.

You are ALREADY a time traveler: You're moving from the present towards the immediate future.

The law of causality states that: "what has happened, has happened and couldn't have happened any other way".
Your statements are correct within the bounds of the current understanding of the laws of physics as humanity knows them. Science, however, rolls forward in its understanding. It is hard to say what the laws of physics will look like in the distant future.
 

neeyik

Posts: 1,839   +2,151
Staff member
3 Billion Joules (Gigajoules) to vaporize someone.

Therefore, it would require at least 3 Billion Joules to rematerialize them.
No idea where you've got the figure from to 'vaporize' a human being, but 3 GJ isn't all that much energy. The Grand Coulee dam could generate that in a little under two and half seconds, for example.

What we really want is a wormhole technology or portal that allows you to connect two points in space and move instantaneously from one to the the next. "Einstein-Rosen bridge" (wormhole).
ERBs are pretty much non-traversable. Have a read of this paper for examples of traversable (particles and at the end of the paper, humans) wormholes. Note the figures for the minimum size of the wormhole's diameter and length of it to be passable by humans: 15,000 km and 3000 light years respectively. In other words, bigger than the Earth and no journey shorter than 3 kly either. Oh and the energy requirements for generating the two wormholes in the first place...
 

Bullwinkle M

Posts: 454   +350
Time Travel from the Present to the Past is impossible.

Time itself is moving forward and doesn't move backwards.

You are ALREADY a time traveler: You're moving from the present towards the immediate future.

The law of causality states that: "what has happened, has happened and couldn't have happened any other way".


Time is a man-made concept, it does not exist!
 

Mr Majestyk

Posts: 676   +582
To be fair ST was set about 300 years in the future so expecting a holodeck in next 30 years is ludicrous. You're score should have also been given for the chances of this happening in the next century at least. Of course it's virtually impossible to extrapolate out too far as science throws up new paradigms it seems randomly that change the way we think and we could never have foreseen, but some things don't change too radically. I'd say Holodeck in mid 22nd century would be highly likely just not the matter replicator. Matter transporter no chance in next 200 years, warp drive no chance in next 200 years. However, it's a moot point, humanity won't even be around in a century.
 

QuantumPhysics

Posts: 4,714   +5,117
No idea where you've got the figure from to 'vaporize' a human being, but 3 GJ isn't all that much energy. The Grand Coulee dam could generate that in a little under two and half seconds, for example.


ERBs are pretty much non-traversable. Have a read of this paper for examples of traversable (particles and at the end of the paper, humans) wormholes. Note the figures for the minimum size of the wormhole's diameter and length of it to be passable by humans: 15,000 km and 3000 light years respectively. In other words, bigger than the Earth and no journey shorter than 3 kly either. Oh and the energy requirements for generating the two wormholes in the first place...


For any theoretical physicist to claim Wormholes aren't traversable is beyond laughable.

They can't even study Black holes yet.
 

dob_1

Posts: 79   +46
Surely Warp Drive (Star Trek), Hyperdrive (Star Wars) or even Fusion Drive (Expanse) should make your list - the latter would, as it does in the series, revolutionize travel in the solar system, and the former two would make interstellar travel possible! They would be memorable!
 

Ravey

Posts: 286   +121
Going straight to the invisibility cloak! - You just need to look at how wildlife can blend into thier surroundsings to know that you dont need to be completely invisible. You just need enough of the body to be broken up to make it difficult for the eye to see. At least when stationary.

Moving is a different matter as eyes are extremely good at detecting any kind of movement, but if you are not actually looking for invisible things you are unlikely to find them!
 

QuantumPhysics

Posts: 4,714   +5,117
Going straight to the invisibility cloak! - You just need to look at how wildlife can blend into thier surroundsings to know that you dont need to be completely invisible. You just need enough of the body to be broken up to make it difficult for the eye to see. At least when stationary.


An infra red sensor would immediately see an invisibility cloak.

You can’t hide the heat of a human body or the machines working to cover it up.

Moving is a different matter as eyes are extremely good at detecting any kind of movement, but if you are not actually looking for invisible things you are unlikely to find them!
 

tygrus

Posts: 20   +8
Tricorder/Medical scan & near instant diagnosing (StarTrek is most famous for).

Travel/communicate faster than light (most sci fi).

Fusion power for electricity (self sustaining, positive net output).

Daily commute to&from a planet surface to orbit ie. ease of space travel (most sci fi).

Brain scan to retrieve & store memories (total recall & probably others).

Climate models that are really reliable .. nope, still going to be science fiction.
 

wiyosaya

Posts: 5,783   +3,988
An infra red sensor would immediately see an invisibility cloak.

You can’t hide the heat of a human body or the machines working to cover it up.

Moving is a different matter as eyes are extremely good at detecting any kind of movement, but if you are not actually looking for invisible things you are unlikely to find them!
IR is simply a longer wavelength EM radiation than visible light. What makes you think that if someone were to come up with a working invisibility cloak, that longer-wavelength EM radiation would not be as easily redirected as visible light?