Space and time prof brad dowden philosophy department california state university sacramento
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Space and Time Prof. Brad Dowden Philosophy Department California State University Sacramento. What is time?. physical time vs. psychological time. Time enables us. to place events in sequence one after the other, to compare how long an event lasts, to tell when an event occurs.

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Space and time prof brad dowden philosophy department california state university sacramento
Space and TimeProf. Brad DowdenPhilosophy DepartmentCalifornia State University Sacramento


What is

time?


physical time vs.

psychological time


Time enables us
Time enables us

  • to place events in sequence one after the other,

  • to compare how long an event lasts,

  • to tell when an event occurs.



According to the definition of time travel, the traveler’s journey as judged by the traveler’s clock takes a different amount of time than the journey does as judged by the clocks of those who do not take the journey.


There s a way now for you to visit sacramento in 2188
There’s a way now for you to visit Sacramento in 2188 journey as judged by the traveler’s clock takes a different amount of time than the journey does as judged by the clocks of those who do not take the journey.

(In case of a zombie attack be sure to take this kit with you).


How long does it take to fall into a black hole

How long does it take to fall into a black hole? journey as judged by the traveler’s clock takes a different amount of time than the journey does as judged by the clocks of those who do not take the journey.


A wormhole can be a time machine
A wormhole can be a time machine. journey as judged by the traveler’s clock takes a different amount of time than the journey does as judged by the clocks of those who do not take the journey.


The grandfather paradox

The grandfather paradox journey as judged by the traveler’s clock takes a different amount of time than the journey does as judged by the clocks of those who do not take the journey.

“I’m from your future.”


Paradox of free information
Paradox of Free Information journey as judged by the traveler’s clock takes a different amount of time than the journey does as judged by the clocks of those who do not take the journey.

  • In 2077, time machines are invented. In 2099 Jones discovers a drug that cures cancer. Jones patents her drug in 2100. In 2121 Smith makes a copy of the patent, enters a time machine, and goes back and gives the copy to Jones in 2099 who then uses it to create a drug that cures cancer. Who had the idea first?


What is space
What is space? journey as judged by the traveler’s clock takes a different amount of time than the journey does as judged by the clocks of those who do not take the journey.


Can space move or is it stuck where it is
Can space move or is it stuck where it is? journey as judged by the traveler’s clock takes a different amount of time than the journey does as judged by the clocks of those who do not take the journey.




Kant left?



Hubble discovered galaxies, and discovered that galaxy red-shift indicates galaxies are receding from us.


What is the Big Bang? red-shift indicates galaxies are receding from us.


To create an apple pie from red-shift indicates galaxies are receding from us.

scratch you should start by…


…creating the universe. red-shift indicates galaxies are receding from us.






What is meant by saying space is a continuum? a cubic box one foot on a side?


So, how DO WE KNOW our a cubic box one foot on a side?space is not

discrete?

Is this a good

answer? “Well,

it’s just obvious

to me.”

So, how do we know

whether our space

is discrete?


What difference would it make to our experience if space were not a continuum

What difference would it make to a cubic box one foot on a side?our experience if space were not a continuum?


Discrete or atomistic space

Discrete or atomistic space a cubic box one foot on a side?

4

5


Pythagorean theorem a 2 b 2 c 2

Pythagorean Theorem a cubic box one foot on a side?a2 + b2 = c2

5

4

5


If so would it be time to invent a new geometry
If so, would it be time to INVENT a new geometry? a cubic box one foot on a side?


Who solved zeno s paradoxes
Who solved Zeno’s Paradoxes? a cubic box one foot on a side?


Have dinosaurs slipped out of reality
Have dinosaurs slipped out of reality? a cubic box one foot on a side?


What is the shape of space
What is the a cubic box one foot on a side?shape of space?


What is a cubic box one foot on a side?

the

Multi-

verse?


More philosophy of time
More philosophy of time… a cubic box one foot on a side?


Why does time seem to have an arrow

Why does time seem to have an arrow? a cubic box one foot on a side?


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