X hits on this document

PDF document

Lecture 2 - The current state of fundamental physics - page 4 / 27

69 views

0 shares

0 downloads

0 comments

4 / 27

The equivalence suggested to Einstein that the path an object follows is a property of space itself, rather than having anything to do with the specific properties of the object.

  • We know that in the absence of any forces, objects follow straight lines, and

we also know that straight lines are the shortest possible paths……

  • Perhaps gravity is a manifestation of objects in free fall following the shortest

possible paths, known as geodesics, in curved spacetimes

It is difficult to visualize curved spacetimes, but the surface of a sphere is a simple curved space. Geodesics are great circles that pass through both poles. We see that they can pull apart and then meet up again….

David Kastor

COSMOS to HUMANITY, Spring 2008

Lecture 2 , slide 4

Document info
Document views69
Page views69
Page last viewedSat Dec 10 14:58:42 UTC 2016
Pages27
Paragraphs214
Words2270

Comments