0
The Matter of Time
         George Musser
           6 June 2009




                         http://www.cs.adelaide.edu.a...
1. How Physicists Visualize Time
Basic Model of Nature

The world                           The world
                    Laws of
  at one                 ...
Spacetime
Spacetime
2. Time Is Special
Objectivity of Cause-Effect Relations
                                   B
            B                  A
        A



 ...
3. Our Experience of Time
Basic Mystery of Time
        There’s a disconnect between
   time in physics and time in everyday life.

a. Arrow of time
The Arrow of Time




                    Scientific American,Jun 08
The Arrow of Time

                     Big
                    Bang
Basic Mystery of Time
        There’s a disconnect between
   time in physics and time in everyday life.

a. Arrow of time...
Flow of Time
Basic Mystery of Time
        There’s a disconnect between
   time in physics and time in everyday life.

a. Arrow of time...
Resculpting Spacetime
Problem of Frozen Time

Space at                            Space a
                     General
  one                    ...
4. The Emergence of Time
The Fine Structure of Spacetime




                        American Scientist,Nov/Dec 91
Relational Time




       t
5. Conclusion
Where Does Time Come From?
   The everyday properties of time
  must emerge from physical time …

     … which might itsel...
http://www.timereverse.com/brochure.asp (top);
http://www.motivatedphotos.com/?id=6545 (bottom)
For More
For a copy of the slides, visit
 www.strings.musser.com
Backup Slides
Basic Model of Nature

State
space     Initial
           state
                                Final
                    ...
Space and Time
Spacetime




Each of us moves into the future
    at his or her own pace.



                  http://casa.colorado.edu/~...
The Arrow of Time

Why did
it begin
here?

             Fresh    Partially   Completely
              egg    broken egg   ...
Where Life Fits In
  food   oxygen   TLC




  heat            bodily
                  waste
Does Time Matter At All?
Time present and time past
Are both perhaps present in time future,
And time future contained in ...
Emergence of Classical Spacetime




                          Scientific American,Jul 08
The Tree
   of
 Physics




           Mercury Nov/Dec 97
But that's a puzzle. The microscopic laws of physics,
governing the behavior of individual objects, are
perfectly reversib...
http://commons.wikimedia.org/wiki/File:Boeing_737-73V_-_EasyJet_Airline_-_G-EZJI_-_LEMD.jpg (top);
          http://upload...
http://en.wikipedia.org/wiki/File:Arbor_Lake-Aerial.JPG (top);
http://hoboken411.com/wp-content/uploads/2009/03/text-messa...
Upcoming SlideShare
Loading in...5
×

The Matter of Time

408

Published on

To open this interdisciplinary conference on concepts of time in the sciences, humanities, and arts, I discuss how physicists visualize time geometrically, the differences between time and space, various puzzles that physicists confront when seeking to understand time, and the question of whether time emerges from some deeper concept.

Published in: Technology, Education
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
408
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
2
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Transcript of "The Matter of Time"

  1. 1. The Matter of Time George Musser 6 June 2009 http://www.cs.adelaide.edu.au/~paulc/physics/picasso.gif
  2. 2. 1. How Physicists Visualize Time
  3. 3. Basic Model of Nature The world The world Laws of at one a moment moment physics later
  4. 4. Spacetime
  5. 5. Spacetime
  6. 6. 2. Time Is Special
  7. 7. Objectivity of Cause-Effect Relations B B A A A B A B A B
  8. 8. 3. Our Experience of Time
  9. 9. Basic Mystery of Time There’s a disconnect between time in physics and time in everyday life. a. Arrow of time
  10. 10. The Arrow of Time Scientific American,Jun 08
  11. 11. The Arrow of Time Big Bang
  12. 12. Basic Mystery of Time There’s a disconnect between time in physics and time in everyday life. a. Arrow of time b. Flow of time
  13. 13. Flow of Time
  14. 14. Basic Mystery of Time There’s a disconnect between time in physics and time in everyday life. a. Arrow of time b. Flow of time c. Problem of frozen time
  15. 15. Resculpting Spacetime
  16. 16. Problem of Frozen Time Space at Space a General one moment moment relativity later EQUIVALENT
  17. 17. 4. The Emergence of Time
  18. 18. The Fine Structure of Spacetime American Scientist,Nov/Dec 91
  19. 19. Relational Time t
  20. 20. 5. Conclusion
  21. 21. Where Does Time Come From? The everyday properties of time must emerge from physical time … … which might itself emerge from deeper, timeless ingredients.
  22. 22. http://www.timereverse.com/brochure.asp (top); http://www.motivatedphotos.com/?id=6545 (bottom)
  23. 23. For More
  24. 24. For a copy of the slides, visit www.strings.musser.com
  25. 25. Backup Slides
  26. 26. Basic Model of Nature State space Initial state Final state
  27. 27. Space and Time
  28. 28. Spacetime Each of us moves into the future at his or her own pace. http://casa.colorado.edu/~ajsh/sr/construction.html#grid
  29. 29. The Arrow of Time Why did it begin here? Fresh Partially Completely egg broken egg broken egg
  30. 30. Where Life Fits In food oxygen TLC heat bodily waste
  31. 31. Does Time Matter At All? Time present and time past Are both perhaps present in time future, And time future contained in time past. If all time is eternally present All time is unredeemable. —T. S. Eliot, Four Quartets
  32. 32. Emergence of Classical Spacetime Scientific American,Jul 08
  33. 33. The Tree of Physics Mercury Nov/Dec 97
  34. 34. But that's a puzzle. The microscopic laws of physics, governing the behavior of individual objects, are perfectly reversible – they work equally well running forwards and backwards in time. Why is the collective behavior of macroscopic objects irreversible, while the behavior of the individual consitutents is perfectly reversible?
  35. 35. http://commons.wikimedia.org/wiki/File:Boeing_737-73V_-_EasyJet_Airline_-_G-EZJI_-_LEMD.jpg (top); http://upload.wikimedia.org/wikipedia/commons/6/60/CandlestickTelephones.jpg (bottom)
  36. 36. http://en.wikipedia.org/wiki/File:Arbor_Lake-Aerial.JPG (top); http://hoboken411.com/wp-content/uploads/2009/03/text-messaging-at-dinner.jpg (bottom)
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×