Lecture 4 | Topics in String Theory

[snjsilvan]

It seams time invariant equations would mean that if a thing happens, then (time being one dimension) to go backwards would simply be to undo (and unlearn) what had happened. Alice comes out, but neither of them remember her going in to begin with. No? Sorry if I'm just stupid and/or confused :n) 

[grunder20]

what is string theory

[agapitoflores001]

Great video. This is a wonderful lecture to listen at.

[cloffff]

@mccdotedu Feynman has been dead since the 1980s.

[mccdotedu]

nice of him to represent feynman since feynman openly ridicules string theory

[flybybutterflies]

Hi guys, I am a psych grad and I am grateful to Stanford for posting knowledge online. So recently, I have started my own lecture series on Psychology, Behavioral Science. do check out my channel if you are interested!

[jreedmcu1]

thank you!!!! i have told people that when we see something we are viewing it in the past relative to the person.... i just wish i knew the math to explain it...

[jreedmcu1]

you make me wanna cookie...

[sam9072000]

I wish i was in this Class because you can't have the actual feeling in this class with this video, and it gives people a feeling to learn much more.

[x1x2x3ct]

lmao he dares wearing a CALTECH pullover at stanford

[GunsNRosesbitches]

@x1x2x3ct He wore that because he was invited at a TED event at Caltech. he spoke about Feynman

[x1x2x3ct]

@GunsNRosesbitches ah alright :)

[nickharvey7]

Could quantum mechanics represent the passage or Arrow of Time?

This theory is based on just two postulates,

1.The first is that the quantum wave particle function explained by Schrödinger’s wave equation represents the forward passage of time or Arrow of Time itself photon by photon, quanta by quanta or moment by moment.

2. The second is that Heisenberg’s Uncertainty Principle that is formed by the wave function is the same uncertainty we have with any future event.

[sn1pe352]

@nickharvey7 lol i run into you all the time somehow :)

[nickharvey7]

@sn1pe352 That is good because I am on YouTube trying to promote my theory on the dynamics of light and time (Quantum Atom Theory) so I need to be seen!

[sn1pe352]

@nickharvey7 you should answer my message i sent you in your inbox, a good yes or no would be great

[noobyfromhell]

@nickharvey7 What a great place to promote a scientific^W crackpot theory!