EPTSpecial Relativity - Page 5
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Dave[9]
United States2365 Posts
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Ssin
United States88 Posts
On April 25 2011 13:47 Dave[9] wrote: Can I be the first to say that it would be really REALLY cool to have LaTeX integrated into the forums so we didnt have to look at crappy text formula's? That would be oh so very awesome. We could have some nice nerdly mathspeak conversations. On a side note, I completely endorse this thread. Relativity is a very interesting subject to get into, and its applications are very fun. Good on you micronesia! | ||
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d(O.o)a
Canada5066 Posts
 happy birthday! | ||
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Starfox
Austria699 Posts
On April 25 2011 07:23 MiniRoman wrote: Holy god damn, thats fast, thanks for putting it into context. My brain when it thinks of how fast its been told light is, recalls something like "takes like from the sun like 4-7 days to reach earth" more like 8-9 minutes ;D | ||
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Quantum314
England217 Posts
On April 25 2011 12:37 GGTeMpLaR wrote: quick question: does time slow down for the light traveling at the speed of light? the speed of light changes in certain mediums so does time speed up for light when it travels through those mediums (such as diamond with a high index of refraction) and then slow back down as it exits the medium back into air? if so, what is the rate at which it slows down compared to the rate at which time slows down for you "running at 2.9*10^8" so that it still appears to be going 3E8 to both you at 2.9E8 and the stationary observer. (in other words how much does time slow down per unit of velocity, or does it only slow down for acceleration? and does it speed up or slow down if you deccelerate?) also, technically speaking, does time slow down if I'm accelerating in a car from 0 to 60 mph (only the amount which time slows would be negligible/unnoticed since the acceleration is negligible)? or is it only a phenomena at high speeds? Time is stopped entirely for a photon (or anything) travelling at the speed of light. Just put v=c in the equations time dilation (gamma) = 1/(sqrt.(1-v^2/c^2). If v = c, then it becomes 1/0 which is infinite, so time is slowed by an infinite amount, and thus is "stopped". Though that is only for the photon itself, it doesnt age at all. It doesnt mean that it travels though time infinitely fast. And yes, time does slow if you're in a car going 60mph. But it is so tiny (as in, infinitesimal) that it makes no difference. I seem to remember Stephen Hawking saying that you could technically make yourself live a little further into the future by staying on a plane for many years, but your life would be cut even shorter by having to survive on air line food! | ||
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Kogut
United States147 Posts
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sceroh
Belgium182 Posts
On April 25 2011 13:09 Kujawa wrote: the reasone the video is wrong is because in order to slow time u need to be going near the speed of light Actually you "only" need 10% of lightspeed in order to slow time. It will only be more important as you become faster | ||
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garbanzo
United States4046 Posts
On April 25 2011 13:47 Dave[9] wrote: Can I be the first to say that it would be really REALLY cool to have LaTeX integrated into the forums so we didnt have to look at crappy text formula's? Oh man, that would be so ridiculous. It'd be kind of silly though considering what this forum is actually supposed to be for. Not a lot of need for LaTeX when discussing Starcraft and progaming. | ||
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youngminii
Australia7514 Posts
On April 25 2011 18:10 sceroh wrote: Actually you "only" need 10% of lightspeed in order to slow time. It will only be more important as you become faster 10% of light speed is still out of our reach. | ||
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youngminii
Australia7514 Posts
On April 25 2011 12:37 GGTeMpLaR wrote: quick question: does time slow down for the light traveling at the speed of light? the speed of light changes in certain mediums so does time speed up for light when it travels through those mediums (such as diamond with a high index of refraction) and then slow back down as it exits the medium back into air? if so, what is the rate at which it slows down compared to the rate at which time slows down for you "running at 2.9*10^8" so that it still appears to be going 3E8 to both you at 2.9E8 and the stationary observer. (in other words how much does time slow down per unit of velocity, or does it only slow down for acceleration? and does it speed up or slow down if you deccelerate?) also, technically speaking, does time slow down if I'm accelerating in a car from 0 to 60 mph (only the amount which time slows would be negligible/unnoticed since the acceleration is negligible)? or is it only a phenomena at high speeds? You're still thinking within the box, you have to expand your mind. Light is not affected by 'time'. 'Time' is not constant. The one and only thing that is constant for everyone in any inertial frame of reference is the speed of light. Time is different for different people in different inertial reference frames. You have to understand this, it is at the core of special relativity. ie. The whole premise of your post is invalid. tl;dr no One more thing: TIME DOES NOT SLOW DOWN FOR YOU EVER Even if you're going at super fast speeds, time will seem exactly the same in your eyes. It will be everyone else speeding up, not you slowing down. | ||
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Hoban
United States1600 Posts
On April 26 2011 01:54 youngminii wrote: You're still thinking within the box, you have to expand your mind. Light is not affected by 'time'. 'Time' is not constant. The one and only thing that is constant for everyone in any inertial frame of reference is the speed of light. Time is different for different people in different inertial reference frames. You have to understand this, it is at the core of special relativity. ie. The whole premise of your post is invalid. tl;dr no One more thing: TIME DOES NOT SLOW DOWN FOR YOU EVER Even if you're going at super fast speeds, time will seem exactly the same in your eyes. It will be everyone else speeding up, not you slowing down. Actually, time will appear to move slowly for the stationary reference frame while you are moving near the speed of light. Conversely, the stationary reference frame will see time moving for you slowly. At first glance, this is very counter-intuitive but if you switch reference frames, so the one speeding along is the stationary reference frame and the one at the origin is the speeding reference frame then you should be seeing the same thing (time moving slowly). | ||
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