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/sci/ - Science & Math

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11085431 No.11085431[DELETED]  [Reply] [Original]

I have to give a 10 minute presentation on extra dimensions to my class. It's a physics 1 honors section. any tips

>> No.11085453

>>11085431
name dimensions for 10 mins.
I will give you a start: time, growth, red, number of -people -birds -faggots and so on.
Happy to help.

>> No.11085500
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11085500

>>11085431
Just show them this shit. A 4th spacial dimensional Tesseract that can roll and casts a 3 dimensional shadow... If only we lived in the 4th dimension instead of 3rd.

Also bring up the classic 4 dimensional arrays that can be used to plot 4 variables at once. Or infinite really. It is staggeringly easy to set up multidimensional arrays in computer programming. Searching through them with an algorythm takes a galaxy brain though.

>> No.11085793

>>11085431
dimensions from easiest for humans to traverse to most difficult (100% fact):
xyz space
time
alternate timelines with same universe starting configurations
alternate universes with different starting configs/natural laws (equivalent, these determine eachother)
alternate systems of above dimensions

>> No.11085948

>>11085793
>>11085453
im sure my professor with a doctorate in theoretical particle physics will love all that bs

>> No.11085962
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11085962

>>11085431
>any tips
Draw two dots on a piece of paper and ask the class what the shortest distance between two points is. Then fold the paper and push a pen through the dots.
The standing ovation should last long enough that your teacher gives you an instant A.

>> No.11085983

>>11085962
is this a wormhole or what is this trying to show

>> No.11086000

Talk about pacman. You know when he goes out one side he comes back from the other.

If you take a square piece of thin rubber, glue left and right together you get a cylinder. if you glue top and bottom of cylinder together( this will require some stretching, you get a torus (donut).

So we can see pacman as living on a torus.

When people talk about higher dimensions they are typically assumed to be glued together like this in some way. Walk just a tiny bit in the 4th dimension and you are back to where you started.

That's why we don't notice them.

>> No.11086044

>>11085983
I'm being facetious, because every movie that deals with "bending space" uses that demonstration to explain to the audience, to the point it's become a meme.
The idea is that its showing how you can fold a 2d space through a higher dimension to make shortcuts.
If you were a flatlander who lived on the sheet, you'd never notice the bending because topologically its still flat-ish for you. If your flatlander started drawing a bunch of big triangles and measuring their angles they might notice that things aren't adding up to 180 degrees like they should.
When people talking about folding space time, it's 3d space being folded into a manifold and you can have similar shortcuts. It's hard/impossible to hold an actual image of this in your mind because we're still animals that evolved to live on the flat ground in a classical environment and theres just no good reason for your head to be able to intuitively reason and visualize that shit.

>> No.11086057

>>11086000
Cont. You can also imagine that before gluing bottom and top ends of the cylinder together, you twist it a bit.

In pacman terms this means that when you go through the top edge you come out from the bottom edge, but not in the same place. You may come out a little bit to the left. So if you go to the top again and again you get more left everytime, of course when you get to the left edge you jump right, and then get more left every time again.

>> No.11086068

>>11086057
cont. You can also talk about what happens to forces and light in higher dimensions.

Imagine you have a 3 normal dimensions and a bunch of small ones (lets say after a few meter you get back to the same place in any of them, to make it easy to visualize). In such a space you place a candle. The candle's light go equally in every direction.

How does light strength decay with distance?

>> No.11086085

>>11086068
damn thank you so much.. this is kind of fucking my mind

>> No.11087633

>>11085962
Holy shit saved.
I forgot about this guy.