5 ms·

I was always wondering if there is a way of distinguishing a straight line in a curved space from a curved line in a flat space, given that you cannot 'look' at

I was always wondering if there is a way of distinguishing a straight line in a curved space from a curved line in a flat space, given that you cannot 'look' at space time from the outside. Would that be possible?

Rapzid 6y ago
The usual suspects; lasers and mirrors. That's how gravitational waves were detected.