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/sci/ - Science & Math


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11429884 No.11429884 [Reply] [Original]

When you break the sound barrier, there's a sonic boom. What happens when you break the lightspeed barrier? Would calling it a visual boom be a thing? I was thinking of writing a sci fi novel and was wondering on the effects of a ship coming out from FTL inside a planet's atmosphere

>> No.11429903

>>11429884
Alcubierre Drive (if possible) would result in a highly destructive gamma ray burst which is kind of what you're talking about

>> No.11430045

>>11429903
Thankyou

>> No.11430055

>>11429884
There is no lightspeed barrier. Light is the fastest form of information travel. Just because you can't "see" it happening, doesn't mean it doesn't exist, as QM researchers are starting to realize.

>> No.11430667

It's called Cherenkov radiation.

>> No.11430865

>>11430667
This. Since the speed of light is actually limited to its throughput through a medium.

>> No.11431074

>>11430865
What's the biggest measure of information known to man? If we managed to shoot a probe back in time, then it came back and began downloading a dozen million years of collected information, what would you call that amount of data?

Other than absurd, obviously.

>> No.11431076

>>11429884
Cherenkov radiation.

>> No.11431084

>>11431074
recently scientists have more or less began to to look at the universe as pure information with each discrete planck length having a different quantum state that can be represented by bits, more or less.

>> No.11431091

>>11430667
imagine how pissed a water-bound intelligent species would get after figuring out they can exceed the speed of light under water only to realize there's a slightly higher limit in vacuum they can't exceed

>> No.11431116

>>11431084
No. They haven't. Space is not discrete.

>> No.11431127

>>11431116
it is, though

>> No.11431133

>>11431127
Planck length is the scale at which quantum mechanics and general relativity conflict and modern physics breaks down. It informs us of the limits of our theories, but says nothing about reality.

>> No.11431277

>>11431076
>>11430667
No. Light travels slower in water than vacuum. The electrons themselves haven't gone faster.

>> No.11431280

>>11431277(2/2)
So it's not true FTL

>> No.11431300

>>11431133
hilbert space is one of the leading concepts applied to quantum mechanics and your "reality is unknowable" retardation doesn't change that

>> No.11431310

>>11431300
I never said reality is unknowable, I said that Planck length gives you no information about reality. Discrete space violates Lorentz invariance.

And you seem to not understand what Hilbert space is.

>> No.11431317

>>11431091
>only to realize there's a slightly higher limit in vacuum they can't exceed

Exceeding light speed is possible. We can do anything if we really want to.

>> No.11431325

>>11431317
Nope. You can't break causality, which means you cannot transmit information or travel faster than c.

>> No.11431343

>>11431325
this

>> No.11432299

>>11431325
What about neutrinos? Wouldn't we be able to send messages back in time if we used neutrinos as a medium? Or just across vast distances in what would actually be FTL communication

>> No.11432317

>ship decelerating from lightspeed
>Inside a planets atmosphere

Nigga youd be doing that astronomical units away from any celestial body, at least

>> No.11432328

>>11432317
Ideally yes, but i'm thinking about an accident

>> No.11432337

>>11432328
Honestly any accident like that would involve total destruction of the planet. Decelerating must occur at a rate that humans can handle the g-force of.

I'd look into UFO sightings, there is speculation that if UFOs are real, then they most likely modify the space around them to travel, enabling for non-destructive, vast changes in "speed" without harm.

>> No.11432338

>>11429884
Good question
This is the answer
https://www.google.com/url?q=https://en.m.wikipedia.org/wiki/Cherenkov_radiation&sa=U&ved=2ahUKEwicl-WxrPrnAhVaxMQBHXpaDJkQFnoECAUQBA&usg=AOvVaw0JGL8nLhw1kGbmGxK8fv68

>> No.11432352
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11432352

>>11431074
>What is a spirit totem?
>What is an organism with a more enduring lifespan and more rigorous information retention mechanism more aligned to physical phenomena?
>What is a tree?

>> No.11433432

>>11432299
Neutrinos don't go faster than light. That faulty measurement was caused by a loose cable.