Has General relativity been proven wrong ?

[jamesfirst]

I'd like to know whether the concept of space-time still exists today

My physics teacher doesn't like to believe gravity in relation to space-time

 

[George Jones]

General has not been falsified by any observations.

 

[bcrowell]

A good nontechnical book on this topic is Was Einstein Right? by Clifford Will.

 

[stevenb]

My physics teacher doesn't like to believe gravity in relation to space-time

Is he/she a theoretical physicist working on quantum gravity, or a high school teacher still suckling on Newton's teat?

 

[Daverz]

I'd like to know whether the concept of space-time still exists today

Yes, and the concept permeates modern Physics.

My physics teacher doesn't like to believe gravity in relation to space-time

Unfortunately, it sounds like your teacher is not very knowledgeable.

 

[DaveC426913]

My physics teacher doesn't like to believe gravity in relation to space-time

What do you mean by this?
Does not believe that gravity is a distortion of spacetime?
Does not believe that gravity is a force distinct from spacetime?

Both those could be implied by your statement, yet one is true and one is false. Either your teacher knows what he's talking about and is telling you so, or possibly he does not know what he's talking about and is telling you so.

The net effect is that I do not know what you teacher is talking about, and am telling you so.