Originally posted by Freedom_for_sum
I believe the theory that speed affects time has been proven as even the clocks on the space shuttle "lose" nanoseconds while in orbit relative to
those on the Earth....
...I don't remember the actual amount of time lost at the speed of light but for some reason this figure sticks in my mind: For every year traveling
at the speed of light, 40 years are lost. In other words, if you travel away from the Earth at the speed of light for 6 months and then return at the
speed of light, every one on Earth will be 40 years older while you'll only have aged 1 year.
Actually, it doesn't make much sense to talk about traveling at the speed of light, since that is impossible. But if you were to travel at slightly
less than the speed of light for a year, you would lose a little more than 40 years.
The applicable equation that allows you to calculate the number of years "lost" is:
t' = t*sqrt[1-(v/c)^2]
t' = time as measured on your vehicle
t = time passing on earth
v = velocity of your vehicle
c = speed of light = 3*10^cm/s; 186,000 mps; 300,000 k/s
when you play with this equation, be sure you use the right units to get the right answer.
An example would be if v/c = .9999 (travel at 99.99% lightspeed) and you kept up this speed for one year, almost 71 years would go by on Earth.
Now for travel at lightspeed.
If you look at the above equation and substitue c for v (as if you went at the speed of light) you can see that no matter how much time went by on
earth (t), no time would pass for you (t'). This means if you really did reach lightspeed, you could go anywhere in the universe in no time at all,
as measured by your spaceship's clock.
But what if you managed to measure off one second of time on your spaceship while you were traveling at v = c? The equation says:
1 = t*0 (1= your time, t = earth time)
This says that t=1/0, or to interpret it one way, the time passed on Earth would be infinite.