Page 3 of 8 FirstFirst
1
2
3
4
5
... LastLast
  1. #41
    Quote Originally Posted by Adam Jensen View Post
    Light travels at the speed of light, so it "experiences" the maximum time dilation, in that time does not move for a photon. Thus, the photon, in its own perspective, leaves the surface of the sun and strikes the surface of pluto, in an instant, even though from our perspective on earth, it takes about seven hours for the photon to make such a journey.

    Relativity is weird.
    More like 5.5 ^^
    Quote Originally Posted by Jtbrig7390 View Post
    True, I was just bored and tired but you are correct.

    Last edited by Thwart; Today at 05:21 PM. Reason: Infracted for flaming
    Quote Originally Posted by epigramx View Post
    millennials were the kids of the 9/11 survivors.

  2. #42
    Merely a Setback Adam Jensen's Avatar
    10+ Year Old Account
    Join Date
    Aug 2010
    Location
    Sarif Industries, Detroit
    Posts
    29,063
    Quote Originally Posted by Linadra View Post
    More like 5.5 ^^
    Really? Thought it was 7.

    Oh well.
    Putin khuliyo

  3. #43
    Quote Originally Posted by Kujako View Post
    Future is easy happens every second, to jump ahead quicker, you just travel quickly so that time moves faster for you relative to everyone else. Backwards, very tricky.
    I think you got that wrong, the faster you're going, the slower times flows from your perspective. Time only moves faster (again relative to your viewpoint) as gravity decreases.

  4. #44
    Quote Originally Posted by staticflare View Post
    So my question is how can light be as fast as time when light is traveling from let's say earth to pluto it still requires a set amount of time before it reaches it. If light were as fast as time wouldn't it reach Pluto instantaneously? How could traveling faster than light mean going faster than time when light isn't as fast as time itself?
    Time isn't a form of speed lol

  5. #45
    Quote Originally Posted by staticflare View Post
    When you really think about the speed of light it's insanely fast when being used on earth or around our atmosphere but when used in a much broader sense for example traveling from one galaxy to another it's incredibly slow. Surely there must be something faster than light we just haven't discovered yet. Will it really take us thousands of years to go from one galaxy to another in let's say 3 million years from now? Is hyperspeed from star trek possible?
    I mean, it sucks, but all of modern physics points to the conclusion that the speed of light is a constraint on our universe meaning that it's not necessarily a property of light, but that the laws of our universe do not allow anything to travel faster than that speed. dem's the breaks.

  6. #46
    Reforged Gone Wrong The Stormbringer's Avatar
    10+ Year Old Account
    Premium
    Join Date
    Jul 2010
    Location
    ...location, location!
    Posts
    15,352
    Quote Originally Posted by Belize View Post
    You should run for Congress. We need more people of science like that on the committees.
    I dunno, at least he's asking questions instead of just assuming. That gives him points in my book.

  7. #47
    Quote Originally Posted by staticflare View Post
    When you really think about the speed of light it's insanely fast when being used on earth or around our atmosphere but when used in a much broader sense for example traveling from one galaxy to another it's incredibly slow. Surely there must be something faster than light we just haven't discovered yet. Will it really take us thousands of years to go from one galaxy to another in let's say 3 million years from now? Is hyperspeed from star trek possible?
    The universe essentially has a limit to how fast anything can travel through it. Light (and a few other things) travel at the very top of that limit, but cannot exceed it. Nothing can.

    The reason it takes so long for light to travel between galaxies is because they are so enormously far apart. Even something as seemingly fast as light seems slow when you consider the size of the universe.
    Last edited by Netherspark; 2016-07-29 at 02:48 AM.

  8. #48
    The Insane Kujako's Avatar
    10+ Year Old Account
    Join Date
    Oct 2009
    Location
    In the woods, doing what bears do.
    Posts
    17,987
    Quote Originally Posted by Vynny View Post
    I think you got that wrong, the faster you're going, the slower times flows from your perspective. Time only moves faster (again relative to your viewpoint) as gravity decreases.
    Slower from your perspective, faster for everyone else. The whole "twin paradox" thing.
    It is by caffeine alone I set my mind in motion. It is by the beans of Java that thoughts acquire speed, the hands acquire shakes, the shakes become a warning.

    -Kujako-

  9. #49
    Quote Originally Posted by Fenris the Shaman View Post
    This thread is making my head hurt.
    Better when high on weed .

    To the OP, you lost me when asking how light can move faster than time. As far as I know, time is not a measurement of speed as it's part of speed's formula.
    The wise wolf who's pride is her wisdom isn't so sharp as drunk.

  10. #50
    Maybe what confuses you between the 2 is when people talk on distance in terms of "light years" or "light minutes"?
    These are used just to avoid big numbers. You take a distance in km (very big number if astronomical) and divide it by 300,000. Now you have the distance in "light sec" instead of "km". Divide this number by 60 will give you "light min"and so on.
    Quote Originally Posted by MeHMeH View Post
    The people you are calling "terrorists" are in fact "freedom-fighters", no amount of stabbings is going to change this.

  11. #51
    Merely a Setback Adam Jensen's Avatar
    10+ Year Old Account
    Join Date
    Aug 2010
    Location
    Sarif Industries, Detroit
    Posts
    29,063
    Quote Originally Posted by staticflare View Post
    When you really think about the speed of light it's insanely fast when being used on earth or around our atmosphere but when used in a much broader sense for example traveling from one galaxy to another it's incredibly slow. Surely there must be something faster than light we just haven't discovered yet. Will it really take us thousands of years to go from one galaxy to another in let's say 3 million years from now? Is hyperspeed from star trek possible?
    Going faster than light is more than an impossibility.

    It's a mathematical impossibility. Because mass-energy equivalence. The faster something goes, the more energy it has. The more energy it has, the more mass it has. The more mass it has, the more energy required to accelerate it. Due to the mathematics of it (the Lorenz equations I do believe?) this relationship between speed, mass and energy, hits infinity when speed is the speed of light (C). The mass of an object at C is infinite, therefore the required energy to accelerate the mass to C will also be infinite.

    The only way to beat C is to go around C. Warping space is allowed because space can (and does) warp faster than C. So Alcubierre drive (a warp drive) is theoretically possible, if negative energy is a thing. Wormholes are also possible, if a way to open them and keep them stable is also possible. Though mathematically possible in Einstein's theories, no wormhole has been observed in the cosmos. Maybe they exist and haven't been found, maybe we need Matthew McConaughey (MUURRRPH!) but as we've never seen one to study, we don't know if they can exist in reality.

    - - - Updated - - -

    Quote Originally Posted by Netherspark View Post
    The universe essentially has a limit to how fast anything can travel through it. Light (and a few other things) travel at the very top of that limit, but cannot exceed it. Nothing can.

    The reason it takes so long for light to travel between galaxies is because they are so enormously far apart. Even something as seemingly fast as light seems slow when you consider the size of the universe.
    From what I've understood, it's not so much that light can't exceed C, as much as light (and other massless particles) MUST travel at C, no faster, no slower.

    I've also understood that if there was a particle (a tachyon in this hypothetical realm of physics) that appeared already going faster than C, then that's acceptable to physics. While there's no observed tachyon and they remain entirely hypothetical, these things could never slow down to C. So basically, objects that go slower than C can never accelerate past C, and objects faster than C, can never decelerate below C. But if no objects can ever accelerate past C, then how a tachyon would ever come to exist is a mystery, and they most likely don't exist.
    Putin khuliyo

  12. #52
    Quote Originally Posted by Kujako View Post
    Future is easy happens every second, to jump ahead quicker, you just travel quickly so that time moves faster for you relative to everyone else. Backwards, very tricky.
    Actually, time slows the faster to travel, up to the point where it ‘stops’ once you reach the speed of light. (to go ‘backwards’ you would need to travel faster than the speed of light)

    Let me explain it this way. A photon of light is trapped inside a container, it bounces in a straight line between the floor and ceiling of the container. The time it take to go from the floor to ceiling and back to the floor again is one second.

    Now if you are to apply a velocity to the container, the photon (still bouncing between floor and ceiling) now travels in and angular direction, as it leaves the floor it travels up to the ceiling but also travels in the direction the container is moving, and then back down again at an angle.

    The photon is still traveling between the same 2 point but now must travel further than when the container was static.
    As time is a measurement of the distance travelled by light, this is the reason time slows the faster you travel. So if you are standing on a train platform time is moving slower for you than it is for the people on the train going past (it is a tiny difference that will never be noticed on earth, but it is still a difference).




    By this same law distances contract as you move. For example if you stand on platform A and measure the distance to the next station platform B. That distance will be larger than if you were to measure that same 2 points while on the train, traveling from A to B. Again miniscule amounts that cannot be noticed on earth. That said distance only contracts in the direction of travel, it cannot contract perpendicular to the direction of travel.

    As for the OP’s question, when moving at the speed of light, time ceases to exist, so the photon leaving the sun, from its own perspective, arrives instantaneously at Pluto. But as we are static, time is a factor and moves slow, so from our perspective it takes around 5-6 hours for that photon to travel that distance.

    - - - Updated - - -

    Quote Originally Posted by Adam Jensen View Post



    From what I've understood, it's not so much that light can't exceed C, as much as light (and other massless particles) MUST travel at C, no faster, no slower.

    I've also understood that if there was a particle (a tachyon in this hypothetical realm of physics) that appeared already going faster than C, then that's acceptable to physics. While there's no observed tachyon and they remain entirely hypothetical, these things could never slow down to C. So basically, objects that go slower than C can never accelerate past C, and objects faster than C, can never decelerate below C. But if no objects can ever accelerate past C, then how a tachyon would ever come to exist is a mystery, and they most likely don't exist.
    The speed of light is C. that is where C comes from in the first place (how it is measures and the inaccuracies there are a topic on their own). Light can move slower than C using a median which would slow its travel, it can also be warped as it travels through space time. Which is effectively a black hole and how its gravity is so strong it pulls space time into which traps the light and bends it back onto itself, therefore not allowing light to escape at all, hence 'black hole'.

    Light cannot travel faster than C as C is lights fastest speed in a vacuum. Other particles may be able to travel faster than light but those are theories and have never been observed. After all traveling faster than light is time travel, if that particle does exist observing it would be very difficult.

  13. #53
    Quote Originally Posted by Adam Jensen View Post
    Really? Thought it was 7.
    It varies between about 4 and 7 hours, average is 5.5.

    It should be closer to 4 hours at the moment - but you will be right in about a century.

  14. #54
    Quote Originally Posted by staticflare View Post
    If the universe is expanding then what lies beyond that expansion? What is outside of what we cannot see or observe?
    The question doesn't make sense, you're conflating layman terms with physical concepts. It's like me asking what you were doing before you were born. Space isn't a bubble or even a balloon that expands, all points of the universe are expanding concurrently it's not filling anything.

    If you'd like a poetic conlusion from that, it means that every single point of the universe anywhere ever is relatively the centre of the universe. So, from your perspective, you are always the centre of the universe
    Last edited by Ryme; 2016-07-29 at 11:01 AM.
    I am the lucid dream
    Uulwi ifis halahs gag erh'ongg w'ssh


  15. #55
    Quote Originally Posted by Linadra View Post
    This is like some flat earth science thread Seems fun. I have a question too! If light is so fast, then why did earth win a race against it by over 8 minutes?
    I don't even understand the question... :P

    When did Earth race light? :P
    Users with <20 posts and ignored shitposters are automatically invisible. Find out how to do that here and help clean up MMO-OT!
    PSA: Being a volunteer is no excuse to make a shite job of it.

  16. #56
    Quote Originally Posted by Kuntantee View Post
    Depends on the frequency
    It doesn't. Sound is a mechanical wave. Light is a electromagnetic wave.

  17. #57
    Quote Originally Posted by Lindon View Post
    It doesn't. Sound is a mechanical wave. Light is a electromagnetic wave.
    Which changes the way it is processed and displayed. Doesn't change the relative difference between frequencies, which what color and thus a good portion of pictorial representation is all about.

  18. #58
    Quote Originally Posted by staticflare View Post
    So my question is how can light be as fast as time when light is traveling from let's say earth to pluto it still requires a set amount of time before it reaches it. If light were as fast as time wouldn't it reach Pluto instantaneously? How could traveling faster than light mean going faster than time when light isn't as fast as time itself?
    Light is the fastest anything can travel. Time isn't a speed, it's a dimension essentially.

    Over a short distance light seems instantaneous because it's so fast. Over a distance of say ~150 million km, IE the distance from the Earth to the Sun, it takes around 7 minutes for a single photon (particle) of light to travel that distance.

    In theoretical astrophysics, faster than light travel would cause a localised warp in spacetime to the object travelling faster than light. That's where the time travel aspect comes in, it's relativity.

    Technically, we are time travelling all the time. The Arrow of Time theory dictates there is an obvious direction of time.
    Last edited by willtron; 2016-07-29 at 11:24 AM.
    1) Load the amount of weight I would deadlift onto the bench
    2) Unrack
    3) Crank out 15 reps
    4) Be ashamed of constantly skipping leg day

  19. #59
    Quote Originally Posted by Kuntantee View Post
    Which changes the way it is processed and displayed. Doesn't change the relative difference between frequencies, which what color and thus a good portion of pictorial representation is all about.
    What? just because I can make a banana look like an orange does not make it an orange.

  20. #60
    Quote Originally Posted by willtron View Post
    Light is the fastest anything can travel. Time isn't a speed, it's a dimension essentially.

    Over a short distance light seems instantaneous because it's so fast. Over a distance of say ~150 million km, IE the distance from the Earth to the Sun, it takes around 7 minutes for a single photon (particle) of light to travel that distance.

    In theoretical astrophysics, faster than light travel would cause a localised warp in spacetime to the object travelling faster than light. That's where the time travel aspect comes in, it's relativity.

    Technically, we are time travelling all the time. The Arrow of Time theory dictates there is an obvious direction of time.
    Time is a measurement relative to distance speed and perspective. time does not exist for a photon of light, neither does distance. (explained different ways by others in this thread too). The time it take a photon to travel from the sun to the earth is only relevant to our perspective. from the perspective of that photon it is instantaneous.

    If a particle could travel faster than the speed of light it would not warp space time. space time is a medium and only a massive gravitational effect can bend space time, such as a black hole. its the theory of general relativity, not relativity (they cover the same areas but are different)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •