I’m wondering what is bending and rippling when we say spacetime can bend and ripple? Is there matter underlying spacetime that allows it to bend and ripple? When I say matter I’m referring to atoms.
But what is the length, width, and height measuring? What are the properties of matter underlying it that allow spacetime to bend and ripple? That’s where I’m lost.
Here is the definition of spacetime?
“In physics, spacetime is any mathematical model that fuses the three dimensions of space and the one dimension of time into a single four-dimensional continuum.”
But if space is literally the absence of matter or physical properties, and time has no...