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

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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


Space and time prof brad dowden philosophy department california state university sacramento

What is

time?


Space and time prof brad dowden philosophy department california state university sacramento

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.


Can fridays last longer than saturdays

Can Fridays last longer than Saturdays?


Space and time prof brad dowden philosophy department california state university sacramento

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

(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?


A wormhole can be a time machine

A wormhole can be a time machine.


The grandfather paradox

The grandfather paradox

“I’m from your future.”


Paradox of free information

Paradox of Free Information

  • 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?


Can space move or is it stuck where it is

Can space move or is it stuck where it is?


After you take all energy and matter out of space what is left

After you take all energy and matter out of space, what is left?


After you take all energy and matter out of space what is left1

After you take all energy and matter out of space, what is left?

Newton vs. Leibniz


Space and time prof brad dowden philosophy department california state university sacramento

Kant


How can we create new space

How can we create new space?


Space and time prof brad dowden philosophy department california state university sacramento

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


Space and time prof brad dowden philosophy department california state university sacramento

What is the Big Bang?


Space and time prof brad dowden philosophy department california state university sacramento

To create an apple pie from

scratch you should start by…


Space and time prof brad dowden philosophy department california state university sacramento

…creating the universe.


Could space be disconnected the way two balls are not connected

Could space be disconnected the way two balls are not connected?


Space and time prof brad dowden philosophy department california state university sacramento

How else did Einstein’s theory of relativity change our ideas about space

and

time?


Spacetime how do you put all at once a rigid yardstick in a cubic box one foot on a side

Spacetime: How do you put (all at once) a rigid yardstick in a cubic box one foot on a side?


What did einstein mean by saying time is relative

What did Einstein mean by saying time is relative?


Space and time prof brad dowden philosophy department california state university sacramento

What is meant by saying space is a continuum?


Space and time prof brad dowden philosophy department california state university sacramento

So, how DO WE KNOW ourspace 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 our experience if space were not a continuum?


Discrete or atomistic space

Discrete or atomistic space

4

5


Pythagorean theorem a 2 b 2 c 2

Pythagorean Theorema2 + 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?


Who solved zeno s paradoxes

Who solved Zeno’s Paradoxes?


Have dinosaurs slipped out of reality

Have dinosaurs slipped out of reality?


What is the shape of space

What is the shape of space?


Space and time prof brad dowden philosophy department california state university sacramento

What is

the

Multi-

verse?


More philosophy of time

More philosophy of time…


Why does time seem to have an arrow

Why does time seem to have an arrow?


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