- #1
PauloConstantino
I have always had this question, and I wonder if someone can explain to me if I am wrong about it.
In relativity they say space(time) can curve around massive bodies. Let's just consider space for a moment.
For example on the surface of a sphere, you tell someone to walk in a straight line, and after a while you can see that the path taken by the person is curved, because you can see that the person has not followed a straight line but has curved around the sphere. You can then see a straight line from yourself to the person, and this straight line does not follow the surface of the sphere.
Is this the sense in which space is curved? Because to me, this shows that space can only be curved in relation to an absolute "straight space". Otherwise you would never know that it is curved. There must be an absolute straight space geometry underlying the curved space.
Can anyone comment on this please
In relativity they say space(time) can curve around massive bodies. Let's just consider space for a moment.
For example on the surface of a sphere, you tell someone to walk in a straight line, and after a while you can see that the path taken by the person is curved, because you can see that the person has not followed a straight line but has curved around the sphere. You can then see a straight line from yourself to the person, and this straight line does not follow the surface of the sphere.
Is this the sense in which space is curved? Because to me, this shows that space can only be curved in relation to an absolute "straight space". Otherwise you would never know that it is curved. There must be an absolute straight space geometry underlying the curved space.
Can anyone comment on this please