Please explain a little about general and special relativity

[payam.a]

Main Question or Discussion Point

Hi dears;
I want you please to explain about the history of existanse of general and special relativity and also explain what are they about? and tell me how einstein proved them.
I should tell that I know a little about them. but i have found different things in different web sites. therefore now i am confused.
at first i request you to explain for me yourself as simple as possible.
after that please introduce some sites for me that i can refer to them.
thanks
payam

 

[rahuldandekar]

You can't do better than the master himself. Have you chanced upon "The Special and General Theory" by Einstein?

http://www.marxists.org/reference/archive/einstein/works/1910s/relative/index.htm

 

[HallsofIvy]

You understand, don't you, that this topic requires whole books to explain?

If you were to say what "different things in different web sites" you have found, we might be able to help.

 

[Fredrik]

What HallsofIvy said.

The very short answer is that SR is about the consequences of the fact that the speed of light is independent of the speed of the light source, and GR is about gravity. GR describes gravity as a geometric property of space-time and states the relationship between the geometry of space-time and its matter content. Matter tells space-time how to curve. Space-time tells matter how to move.