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riddle for physics people

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Old May 7, 2003 | 10:40 AM
  #31  
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Default Re: riddle for physics people

No one is right or wrong and it doesn't matter where you got your information. We're discussing a hypothetical question about something that could never physically take place. How can you be incorrect about something that can't even happen?

I kind of like this theory:
“You need to realize that when you say you are traveling the speed of light, that has to be with respect to, or relative to, something else. It is an underlying fundamental assumption of Einstein's special theory of relativity that uniform, non-accelerated motion has no meaning of and by itself. That is, there is, by assumption, no meaning to the idea of moving uniformly at the speed of light in an empty universe. That state is completely equivalent to being at rest in an empty universe.

I preface my answer with this comment because it leads immediately to the answer to the question. Imagine that you are in your car traveling at the speed of light and that you turn on your headlights. That state of motion is utterly equivalent to being at rest in an empty universe. Since, when at rest, the light from your headlights would be launched forward from your car at the speed of light, relative to you, with a certain color spectrum, that is exactly what would happen if somehow you could be moving instead at the speed of light.

In other words, the presence or absence of other objects or matter in the universe relative to which, if present, you could make a determination that you were moving at the speed of light makes absolutely no difference to your own experiences and experiments. The light that you launch behaves in exactly the same way whether the other referential matter exists or not.”

New question:
What would happen if I reached the North Pole and kept going North?
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Old May 7, 2003 | 11:00 AM
  #32  
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Default Re: riddle for physics people

Look until somebody puts a LSF15 jet motor in there truck we're never gonna know what happens.

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Old May 7, 2003 | 12:37 PM
  #33  
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Default Re: riddle for physics people

Oracleknowledge-this is what you quoted:

If you want to know what happens when you are driving at very nearly the speed of light , an answer can be given. Within your car you observe no unusual effects. You can look at yourself in your mirror which is moving with the car and you will look the same as normal. Looking out of the window is a different matter. The light from your headlights will always go at the speed of light in your reference frame. It will strike any object in its path and be reflected back. Everything else will be coming towards you at nearly the speed of light so the light reflected off it will be Doppler shifted to very high frequencies towards the ultraviolet or beyond. If you have a suitable camera you could take a snapshot. The objects passing are contracted in length but because of the different times of passage for the light and effects of aberration, the snapshot will show the objects you pass rotated.

So that is not the answer to the question that has been asked. I completely agree with what Casper said/quoted but, I don't think Crazyidiot4.8 was thiking of an empty universe. If you accelerated with your headlights on to the speed of light, I agree, there will be light reflected from objects back to you. Now, if you were traveling at the speed of light and then turn your headlights, I firmly believe there will be no light reflected back to you. In Einstiens equation of E=MC2, C being the speed of light, it is a constant value not a variable one. Light cannot accelerate nor decelerate, it is a constant speed that never changes, even from a moving object. I think of it this way, Truck A represents your headlights and Truck B represents you. If truck A accelerates to 80mph 5 seconds before you accelerate to that same speed, you will never catch him up-truck A will always stay ahead. Now, If truck B would push truck A to 80mph and then truck A would accelerate to 80mph, it would not launch to 160mph or ahead in any way. I'm not an expert in physics but, this is the simplest way I can imagine or explain this qeustion to myself. I may be completely wrong, if so, please explain this in a way I may better understand. Like I said, I completely agree with what Casper qouted but again, an empty universe is not what we're talking about, at least I didn't think so.
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Old May 7, 2003 | 02:02 PM
  #34  
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Default Re: riddle for physics people

Good point.
This whole thing is hypothetical anyway... I did not mean to call anyone out and say they were wrong, please do not take it that way, I was just curious as to the source of information... I am always eager to learn more.
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Old May 7, 2003 | 02:06 PM
  #35  
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Default Re: riddle for physics people

New question:
What would happen if I reached the North Pole and kept going North?

your compass would be very confused

Can you even answer that question? After you arrive at a destination, how do you get there again?
Example:
Wife: Go to the store on 5th street.
You: Ok, I am at the store on 5th street.
Wife: Ok, now go to the store on 5th street.
You: But!?!

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Old May 7, 2003 | 02:58 PM
  #36  
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Default Re: riddle for physics people

Quote:

Good point.
This whole thing is hypothetical anyway... I did not mean to call anyone out and say they were wrong, please do not take it that way, I was just curious as to the source of information... I am always eager to learn more.

I feel the same way, very curious. Science always grabs my attention. Didn't get offended by anything, I love to challenge the mind every now and then. Thanks for the "struggle."
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Old May 7, 2003 | 06:07 PM
  #37  
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Default Re: riddle for physics people

New question:
What would happen if I reached the North Pole and kept going North?

your compass would be very confused

Can you even answer that question? After you arrive at a destination, how do you get there again?
Example:
Wife: Go to the store on 5th street.
You: Ok, I am at the store on 5th street.
Wife: Ok, now go to the store on 5th street.
You: But!?!


Well, partly correct.

If you are at the North Pole you can't go geographically north. You can only go south. No other direction. If you wanted to go north according to your compass you would end up in Canada.
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Old May 8, 2003 | 04:24 PM
  #38  
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Default Re: riddle for physics people

All I know is that silent1's truck is very slow. So I have a question for all of you: If your truck is as slow as silent1's and you turn on your lights what would happen?
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Old May 8, 2003 | 09:53 PM
  #39  
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Default Re: riddle for physics people


New question:
What would happen if I reached the North Pole and kept going North?

I would imagine that you would walk around in a cirlce!
As for silent1 truck. its got to be faster than my truck. i run a 15.7 stock and after whipple charging it ill be suprised if it even runs a 15.0 flat.

lets say the speed of a bullet flying out of a gun is 600 mph. if your on the outside of a plane flying 600mph and fire backwards, does the gun have no recoil and the bullet just sorta falls out?
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Old May 8, 2003 | 11:17 PM
  #40  
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Default Re: riddle for physics people

yeah silent one is taking out his 5.7 to put in a TBI 305
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