# Universal speed of light

1. Jul 15, 2010

### 13habelbrea

Dont want to read all of this, then just read the last paragraph. If you still mixed up then read all of it.

Why does einsteins theory of general relitivity deal with c, the speed of light in a vacuum, the speed of light can take on many different forms when traveling through mass. But whats so spechial about the speed of light in a vacuum. Would not this mean that the empty space (called a vacuum) as something to deal about the proportys of the photon? All I know is that when you put light with open space it's the fastest thing in the world.

Heres what I think about a photon. Normaly when you have a matter, you have more energy and potential for speed. But when you put light into the mix it will reflect of matter to get us colors just like it does not want to be put in with energy/matter. When light is put with matter it slows down when matter contains all the energy. So the electrons and neutrons and protons seem to reject light with there energy. Or sufficate is so that is will slow down.

So heres my question to you science huggers, because our constant c, the speed of light is written all over im mathematics (which we use to relate and calculate life) would the speed of light in a vacuum have to deal with the proporty of the photon? Or maby the proporty of space? I have been thinking about for some while but.

(Thanks)

2. Jul 15, 2010

### Antiphon

It's a property of space-time.

Many physical effects are propagated at c, not just light.

Also, general relativity deals with c as well.

Think of it like this: c is a number that tells you how nature balances time against space. When someone asks you how far you are from someplace they often answer with a time instead of a distance. It's like saying that New York is 2 hours from Los Angeles in an SR-71. Except nature is a lot faster.

Last edited: Jul 15, 2010
3. Jul 16, 2010

### 13habelbrea

Is it a proprty of matter to be slow or a proporty of light to be fast. I know its nature all of this is in the natrue of science, but why, where does it come and why is it there? Whay kind of science takes place that says light shold be the fastest? When we come to the photon I have even heard that it has to mass. Think about it, has no mass and then light can get intefeared with a black hole?

4. Jul 16, 2010

### ZapperZ

Staff Emeritus