MoTo^ said:
try explaining colours to a blind person who has never seen, do you think this is possible?
Of course there is a slightly obvious technical answer of talking about wavelengths of light (350nm<->700nm) and the fact that colour is simply the result of photon emission at a specific wavelength. But of course I know what you mean.
I should probably try and clarify at this point what we are all talking about, since it seems to have gotten sidetracked somewhat. The point is, that we will never understand everything, simply because there is too much to understand.
We are but ants lost in a vast field; we strive to learn of the leaves of grass that stand above us, but know not of the world beyond
(Me, 2005 
)
That of course, should not mean that we should not
attempt to learn all we can.
...and back on topic.
it is, in theory, possible to travel forward in time, Einsteins E=Mc2 thing
Never say that to a physist!
I assume you are talking about the special theory of relativity rather than the amount of theoretical energy in a fixed mass.
Yes, according to the theory of Special Relativity, you can travel forward in time by going close to the speed of light, but... do you not do that already??? How do you define 'the future', and how do you define 'time'? What, to you, may seem like a long time, may to someone else seem like a very short time.
On a slightly related note, you can see this effect for yourself. A younger mind works faster than an older mind, and that is why a young child often gets bored quickly, and why those early days of school seemed to drag on forever... they really did, because your mind worked fast enough to be able to measure time.
An older mind, by contrast, is somewhat slower and also bogged down with extra information, for example stress incurred during a day. Time seems to fly because you're so preoccupied that you don't notice it pass.
And therein lies how you deal with these problems in physics: frames of reference.
When factoring in something travelling at near-speeds of light, you have to take into account two frames of reference, or simply 'points of view'. You can take into account an observer at rest, and someone who is travelling at the fast speed. In fact, I'd go into even greater detail but since I see that you are becoming bored and tired I'll step aside and let someone else make their point of view known.
(I've just studied this stuff so I do have a vague idea of what I'm talking about
)
