[Sephiroth]

Thanks Rion of fire for your little lesson on periods. I do belieave I used them.

Anyways I guess he was trying to show off because he knows what e=mc^2 means. Maybe the dim wit didn't understand what I was saying.

We all know the speed of light in a vacuum is constant,But light slows down when travelling through a medium. This doesn't make much difference when it is travelling through air, but it does make a difference in many other media. For example, light going through glass slows down to 2/3s its speed in a vacuum. Just like it's harder for a person to move through water than through air photons (massless particles that make up light) move slower when going through a medium that is difficult for them. Certain states of matter slow light down a huge amount and by using these states of matter, scientists can slow light down to a "human" speed.

It is possible to reach the speed of light. If you were to go the speed of light you would not know it. Its the accelleration of the object(Being us) that we would notice not the speed.

For your e=mc^2 comment. Relativity tells you your invariant mass is zero, and so is the passage of your proper time; you don't have a rest frame in that case. So you would not cease existence.

[RionOfFire]

Why, you speak as if you have some sort of knowledge of physics that has not been discovered and used for decades. Have you derived a better formula that shows that travelling at the speed of light is possible? According to E=(mc^2)/(1-(V^2/C^2)), once one hits the speed of light IN A VACUUM, well... you can't. It just cannot be done, according to the combined knowledge of all of the physicists in current existence. Agreed, you do not cease to exist. You simply cannot achieve the speed of light in a vacuum.

Sure, one can slow down light. That does not change the constant c, which is the speed of light in a vacuum. That is the number that is used in the equation E=mc^2. Time only begins to slow down according to the frame of reference that is doing the travelling once its speed is a significant fraction of c.

Hell, if I was able to slow down light to a walking, or even running pace of a human, that does not change the value of c. That does not allow me to "run back through time". It would be one hell of a trick, but it does not fundamentally effect time when viewed through the frame of reference of someone standing watching the beam move.

Again, yes. Glass does slow down the speed of light. I am looking forward to seeing the schematics for your transportation device that can travel through glass (or another solid form of matter).

Now for a personal note. Dimwit? Ouch, that hurt. And I do not appreciate such harsh words where none were called for. Show off? Probably. Thank you for pointing that out, with no sarcasm intented here.

<OCDness>You spelled "believe" wrong.</OCDness>

[Sephiroth]

First off your the one that started with me.. Correcting my gramatic errors. I will tell you that im not the best speller in this forum but I don't hold the "Worst speller" In the forum title like gary.

I have not taken any physics classes yet. And I have not taken any Astronomy classes either.

I don't remember saying I was creating something out of a vacuum..I was using the "Light in a Vacuum" As a reference because its constant. Therefor its always going the speed of light.

I didn't wan't to use anything because light can slow down or speed up through other medias.

What I am saying is when light travels through glass its speed is cut 2/3 of that in a vacuum.

"Hell, if I was able to slow down light to a walking, or even running pace of a human, that does not change the value of c. That does not allow me to "run back through time". It would be one hell of a trick, but it does not fundamentally effect time when viewed through the frame of reference of someone standing watching the beam move."

...The value of c is what we are slowing down.. The speed of light would be the constant...If im correct. And We see into the past right now. When you look at the sun you are seeing light that was in the past. Roughly 8 light minutes into the past.