In what medium do light, energy, and matter exist?

[Pattonias]

In what medium do light, energy, and matter exist?

I'm wondering what medium, material, substance do light, energy, and matter exist in. I'm not saying that I neccesarily think there is one, but I am wondering what the theories are in relation to our universe.
Do these three things exist in a medium like sound travels through air or fish live in water?

Is there actually such a thing as absolute nothing?

 

[Dale]

I don't know why people get the idea that spacetime must either be a material or "nothing". Spacetime has geometric properties such as distances (intervals), angles, and curvature. It does not have material properties such as velocity or density.

 

[Pattonias]

I don't know why people get the idea that spacetime must either be a material or "nothing". Spacetime has geometric properties such as distances (intervals), angles, and curvature. It does not have material properties such as velocity or density.

Well I figure some people don't know one way or another and might feel the need to ask those who do. I can't speak for people, but that is why I asked.

 

[Dale]

Fair enough. The point is that you only know what something is by the properties it has. In the case of spacetime it has the properties that I mentioned above.