Can you explain more about General Relativity in Physics?

Suppose you have a membrane stretched as a plane sheet over a long area. if you leave a small ball on it it will remain as it is . But if you now put 1 kg at some point on the membrane and then put a small ball anywhere, you will find that the ball will run towards the heavyweight. Now you may interpret it as if the weight is attracting it or you may say that the space around the heavy weight is curved so that everything else around it tries to move towards it. Classical Newtonian gravitation makes the first kind of postulate that masses attract each other. Whereas Einstein makes the assumption that the space itself bends around massive objects. Now how do u decide the bending of space. We know that light travels in straight line. So if light travels in straight line in certain region the space is not curved but if it bends then the space is curved. This hs been verified by experiments done during Solar eclipse.