Curved Space-time

• Curved (non-Euclidean) space-time.

• Example from previous slides: Space can be curved in either positive or negative directions

A

B

C

Sum of angles less than 180°

C

D

Sum of angles greater than 180°

E

• “Inertial motion” in a curved space is defined to be motion along the shortest path - generalizes the idea of a “straight line” in flat space

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