i have another theory idea
everybody move in the speed of light

there is no such things as if a transport that can make us travel as fast or faster than light, then we will moving back in time
like the twin paradox which proposed by Einstein

my idea:
we see everything moving in the speed of light
when a car move faster than us, the the car is moving in a different velocity, but still travel in the speed of light. agree?
if we ever created a rocket that can move faster than light, then we see the rocket moving in the speed of light, but in the passenger in the rocket also see us moving in the speed of light.

just my idea........any1 can convince my idea is wrong?

[?] ??

1. Going from zero to lightspeed is not acceleration? Then what is it called? Velocity?

2. Lightspeed just mean 300k km/s. Does it mean that you can only call it lightspeed if you use conventional rockets and not some other way? If somebody can travel more than 300k km/s using some other method, it is not breaking the lightspeed barrier? Or is lightspeed barrier just solely reserved for the theory of relativity?

3) Yes, current scientific laws and theories puts a boundary at light speed. I did state that fact "CURRENT scientific knowledge". I guess it also includes current rocket technology and not "never know the future" propulsion technology. If that is the case, why discuss about the speed of light when a rocket can only go a fraction of the speed of light? If you want to say "IF you can travel at near the speed of light", that is about the future, no? Based on current technology, it is an impossible "if".

What I'm saying is, there are probably some unknown theories in the future that either improve or disprove this theory, enabling a work around to the lightspeed barrier.

Better get back to my sci-fi games.......

[exit forum]

azarimy:

Not really; to make this clear, we label the twin brothers [1] and [2], [1] being the 'stationary' observer, and [2] being the person on the rocket flying off at some velocity

To [1], time goes by slower for [2]. But here's the important point, if [2] looked at [1], he would also see that time goes by slower for [1]. It's purely symmetrical because they're moving at the same velocity (well, excepting the +/-) relative to each other.

What u guys england2 ah?

Does this mean that if we travel at the speed of light, we will biologically age much slower? Would we return back the earth (frame of reference) and see our twin as a grandfather while we are still young?

This topic is really interesting. I would love to jump in in the discussion but i dare not to. Wrong conceptions might lead to hazardous consequences, as i am not qualified to speak up my mind on this matter. Do continue the discussion, reading this thread is better than watching movies or reading novels I have to say.

well here's a concept  of mine, if one could move really fast as the speed of light or as the neurons in our body imagine this, if speed present now is normal e..g a boy drops a pen from his hand but at the same time u went to another planet, stop by there, proceed to a nother galaxy sit and talk with those people in that particular planet in that particular galaxy * assuming the living things/creatres there moves as fast as u do* and come back to earth near the boy. when u c him it looks as if nothing changes. This may look as though stopping time but its we are actually moving very fast but for the boy..its just normal.

Put yourself in a tortoise position.

travel in the speed of light will overkill you. the velocity of light is 3x10^8 m/s. moving in space will create a fraction and you will become ashes in no time except your body is made of light!

for me, time travelling is completely nonsense . no such thing . no one can ever done it . and there are sooo much other phenomena present in the universe still cant be described by human since they are using human mind ( in other word, creation mind , not creators mind )