A physics question . . .
Just curious . . .
There is a lot of space between the electrons in an atom and the atom's nucleus. So much so, that an atom is mostly empty space. Which means the objects they create are mostly empty space. Which means the world is very much an illusion, as many objects seem so solid.
So my question is . . . what makes light bounce off of an object?
Obviously is doesn't bounce off of all objects, it can go through many, like air, glass, water, and some plastics. What is it about the atomic make up of an object that allows or doesn't allow the light in our visible spectrum to pass?