einsteins relativity..

Well the answer is that speed and object is relative to each other and not time has time does not excist time is an illusion i think.
 
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ColJack said:
that's the definition I was hoping to get from someone..

it's true that if you were traveling away from the earth at half the speed of light, if you had a telescope capable of looking at the earth as you flew away, you would see everything on the earth moving at half the normal speed..

if you traveled for 1 year and stopped, the earth would appear to be 1/2 year behind you time wise..

but if you then traveled back towards the earth, again at half the speed of light and with the same telescope, then everything on the earth would be seen to be moving at 1.5x the normal speed.. ( 1x light speed traveling towards you, 1/2x light speed you are traveling towards it..)

if the whole trip took you 2 years (1 there, 1 back.. ) then 2 years have passed on the ship, and 2 years have passed on the earth..

so time is not relative to speed..

if you flew towards that same star that is 10 lightyears away at the speed of light, you would see 20 years of it's history as you approached it, intercepting the light as you traveled.. ( 20 years because what we see is 10 years old, and the trip takes 10 years.. )
Click to expand...

If you read about the theory of relativity, its possible to slow time down, but not possible to speed it up, thus your workings out are basically based on a false assumption.

By using 2 Atomic clocks and a Jet plane, scientists have already proved the concept of time travel.
A little Googling will provide a wealth of information..
 
I disagree (with Noseall)

This is a perception thing IMO.

In your spaceship with no windows, if you travel for 15 minutes according to your wristwatch, both at light and sub-light speeds, you will still have witnessed the passing of 15 minutes.

Therefore, how are the speed of light and time connected?
 
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Google it and you will come across a minefield of info way too highbrow for me.
 
megawatt said:
I disagree (with Noseall)

This is a perception thing IMO.

In your spaceship with no windows, if you travel for 15 minutes according to your wristwatch, both at light and sub-light speeds, you will still have witnessed the passing of 15 minutes.

Therefore, how are the speed of light and time connected?
Click to expand...

this is where the theory becomes interesting.

a wristwatch is a mechanical object and may indicate the passage of time.

in reality the passage of time will not be so.

neither will the speed, or close to the speed of light.

the explanation of theses events are made simpler by using comparisons to the ability of an object being able to travel at light speed.

we all know this is not possible.

try and imagine yourself sitting at the front of a beam of light.

at this speed, time WILL stand still. ;)
 
In your spaceship with no windows, if you travel for 15 minutes according to your wristwatch, both at light and sub-light speeds, you will still have witnessed the passing of 15 minutes.
quote="megawatt";p="795348"]
Surely time can only be measured on earth.We measure time by the orbit of the earth to the sun if you are in space and not orbting the earth how can time be measured?
 
no one is grasping the fact that nothing can REALLY travel at the speed of light.

BUT.. if an object did, then time would cease to pass.

here on Earth it is 7:09, January 11, 2007.

it is the same date and time on the planet 'Joe' which is 10 light years away.

but, if i were to look from my planet Earth, into the night sky, i see an image of that planet as it was 10 years ago.

How so? i hear you all ask. this is what Einstein wondered too.

the importance of discovering, that the speed of light remains constant, regardless of the fact the object omitting light may be in motion, can not be underestimated.

once you get your head round this, things really become confusing.
 
Sorry folks but what you are getting wrong is that light speed and time dilation is nothing more than a trick with optics whereby you view the world as it was x amount of time ago. Well it doesn't work like that. If you orbit the earth at near light speed you will experience time dilation and when you land you may have been gone for millenia as far as their lives go on Earth (ie the people that launched you) but only months in the timescale of the rocket crew. It has nothing to do with optical observation.
 
Bet einstein wouldnt have been able to work out the DonD problem ;)
 
the atomic clocks were slowed down ( east bound plane lost 59 nanoseconds ) or sped up ( westbound plane gained 273 nanoseconds ) due to gravitational effects.. not speed..

the stationary clock on the surface is in fact traveling east at the speed the earth rotates ( for arguments sake say 1000mph east )

the stationary clock cuts through so many lines of gravity as it goes east..

the eastbound plane traveling at 650mph east ( in relation to the stationary clock , so 1650mph east ) cuts many more lines of gravity.

the westbound plane traveling west at 650mph ( in relation to the stationary clock, so 350mph EAST.. ) cuts many fewer lines of gravity...

I have no idea what the actual effect of the gravity lines have on the atoms in the clock, but they must contribute to the decay rate of the atoms since the more they cut, the slower the decay rate..

they should take an atomic clock out into a synchronous far earth orbit and see if it affects the clock..

anyway. atomic clocks are a physical means of measuring time, just like a watch..
 
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