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/sci/ - Science & Math

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10716759 No.10716759 [Reply] [Original]

So if I'm understanding relativistic time dilation correctly, if you were to travel any distance, no matter how far at exactly the speed of light. You would reach your destination in exactly 0 time passed from your perspective? Why do people say interstellar space travel takes to long for human life spans even at the speed of light if that is the case?

>> No.10716764

Are you suggesting that light travels instantaneously?

>> No.10716769

>>10716764
No? I'm asking if you experience 0 time passed while traveling any distance at exactly light speed.

>> No.10716774

>>10716759
>You would reach your destination in exactly 0 time passed from your perspective
I don't think so bud, and travelling at the speed of light would require an infinite amount of energy so not happening

>> No.10716777

>>10716774
>so not happening
yet, give it +/- 1000 years if we dont extinct before

>> No.10716786

>>10716774
>I don't think so bud, and travelling at the speed of light would require an infinite amount of energy so not happening

Yes, but just assume you were somehow accelerated to 1c (and you didn't die during the acceleration process).

>>10716777
Where are you going to get infinite energy from friend?

>> No.10716833

>>10716759
Correct sort of but it doesn't serve much purpose to assume perspectives at C

>> No.10716840

>>10716833
What about really close to C? It would still be useful for space travel if a 30,000 light year trip only took 1 year from the perspective of the passengers no?

>> No.10716850

>>10716840
Useful to those travelling near C but redundant for those left behind. They'll be long dead by then if not extinct

>> No.10716854

>>10716850
Sucks for them I guess, but humanity can still utilize it for long distance space travel, just not the whole of humanity.

>> No.10716973

>>10716840
apparently this is impossible because we have too much mass, some one correct me but the only things that can get to that type of speed are massless "particules" like the photon , quarks and gluons etc

>> No.10716988

>>10716973
no im pretty sure nothing will stop you accelerating toward c at a very slow pace

>> No.10717013

>>10716988
nop, you gonna need a huge amount of energy to get close to that speed, for example the limiting factor in a car to get to higher max speed is the power of the engine

>but this is space we are talking theres no aerodynamic drag.

you will encounter some type of "drag" when you get closer to C even in the "vacuum of space" (because is not just "space" its spacetime).

>> No.10717024
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10717024

>>10717013

>> No.10717036

>>10717013
Doesn't the "drag" in space come from lone hydrogen atoms?

>> No.10717155

>>10717036
danm it!, how the hell can you guys be this dumb and not understand analogies!!! for Fsake! I don't mean "matter drag" i mean that you need a huge amount of energy to move mass at the speed of light this is what I mean when saying you gonna encounter "drag" that will make it impossible to get humans at the speed of light.

I'm using "drag" as an analogy!!!

here, have a video:

https://www.youtube.com/watch?v=c4z6RZXv5p8

>> No.10717188

>>10716759
Yes, traveling near the speed of light will take almost no time at all in your perspective. Do not expect to return to your family though

>> No.10717339

>Why do people say
People are stupid. Don't listen to them.

>> No.10717487

so light speed is unreachable because acceleration energy starts getting stored as mass instead of speed, right? Does that mean that if you somehow accelerate an object far enough it will turn into a relativistic black hole?

>> No.10717916

>>10717487
That's a fun thought. Going so fast you become a black hole. But I guess aren't around at that point

>> No.10717921

>>10717487
Would explain black holes as acceleration gates, if we ever see something leave leave one

>> No.10717954

>>10716764
well if light had a reference frame, light would travel instantaneously

>> No.10717965

>>10716786
Even if you accelerated to a speed close to c, sure your time would be like a few moments for the duration of the trip. But to an outside observer, you would take much longer.

Imagine you had a photon traveling in space to some planet located 30,000 light years from you. From the perspective of the photon, no time at all will pass between when it started to when it gets to the planet. But from an outside observer, it will still take 30,000 years for that photon to get to the planet.

>> No.10718014

>>10717339
Yes for example the people on /sci/