/r/physicsgifs

GIFs that show physics principles at work in the real world or in a simulation.

## About

This subreddit is dedicated to showcasing interesting and entertaining physics principles in work in the real world or in a demonstration.

## Rules

Submit gifs that show the interesting world of physics. Be it pendulums, crashes, or physical models.

Explanations for whatever is happening in the gif would be preferred, but isn't required. If you understand what's happening in the gif, feel free to put an explanation in the comments.

Also, please upvote intelligent and informative comments. Don't keep the upvotes soley for puns and references and all of that jazz.

Don't post videos.

## Filter By Category

## Symbols, Superscripts and Subscripts

**Superscript**

- E = mc
^{2}is written as E = mc^(2)

**Subscript**

- v
= v*o*- (a * t) is written as v*_o_* = v*_f_* - (a * t)*f*

**Arrows**

- Equilibrium arrow: ⇌
- Left Arrow: ←
- Right arrow: →
- Left/Right Arrow: ↔
- Up Arrow: ↑
- Down Arrow: ↓
- Up/Down Arrow: ↨

**Equality Signs**

- Less Than or Equal To: ≤
- Greater Than or Equal To: ≥
- Not Equal: ≠
- Approximation: ≅

**Additional Symbols:**

- Theta: θ
- Degrees: °
- Mu: μ
- Sigma: Σ
- Delta: Δ
- Phi: ϕ
- Omega: ω
- Alpha: α
- Pi: π
- Plus or Minus: ±
- Integral Sign: ∫
- Square Root: √

*Please use these to help out fellow redditors that haven't studied physics!* Live Example.

## Other Subreddits

/r/physicsgifs

588

23 Comments

2024/05/17

08:31 UTC

08:31 UTC

77

6 Comments

2024/05/02

06:43 UTC

06:43 UTC

336

Beautiful physics in motion!

9 Comments

2024/04/20

18:22 UTC

18:22 UTC

26

2 Comments

2024/04/09

13:44 UTC

13:44 UTC

2,615

27 Comments

2024/04/09

02:24 UTC

02:24 UTC

205

Graph of Life

Hello everyone. I have been working on an evolutionary algorithm based on game theory and graph theory for three years now. In this algorithm complex life emerges through autonomous agents.The nodes are all individuals with their own neural networks. They see each other, make decisions and compete for scarce resources by attacking or defending. They evolve with natural selection and are self organizing. They decide themselves with who they want to interact or not. Reproduction happens at a local level and is dependant on the decisions of the agents. The algorithm happens in discrete iterations.

I‘m reaching out because I‘m a bit stuck currently. Originally the goal was to invent an algorithm where open ended evolution can occur, meaning that there is no optimal strategy, meaning that cooperations with ever encreasing complexity can emerge. The problem is that I don’t know how to falsify or prove this claim. The problem I have is that I don‘t know how to analyse this algorithm and the behaviors that emerge. I don‘t know how to find out what behaviors emerge and why other behaviors vanish. Also I don‘t know how I could quantify cooperation (if that happens at all).

Also one thought experiment that would be interesting: lets say intelligent life would emerge in this algorithm and they would do physics to find out how their reality works: what is the most fundamental thing they would be able to measure? I also don‘t know how to approach that, essentially it would be interesting to somehow interact with the algorithm and try to gain as much information as possible.

Also keep in mind that this is not just one algorithm, but a whole family of algorithms, that all work slightly differently. So the concept should in some way be general enough to be implemented for all cases.

Find the code at my github repository: https://github.com/graphoflife Find more videos at my instagram: https:// www.instagram.com/graph.of.life

25 Comments

2024/03/28

14:26 UTC

14:26 UTC

474

12 Comments

2024/03/27

14:50 UTC

14:50 UTC

5

I found this youtube channel useful for those preparing for the may june exams.

It has topical questions solved from past papers in both multiple choice questions and structured questions. Checkout the playlists in the site below

1 Comment

2024/03/27

10:48 UTC

10:48 UTC

69

9 Comments

2024/03/15

14:56 UTC

14:56 UTC

249

15 Comments

2024/03/13

23:08 UTC

23:08 UTC

215

15 Comments

2024/03/01

19:41 UTC

19:41 UTC

108

7 Comments

2024/02/29

13:52 UTC

13:52 UTC

24

0 Comments

2024/02/27

16:49 UTC

16:49 UTC

1,405

67 Comments

2024/02/22

20:19 UTC

20:19 UTC

260

5 Comments

2024/02/22

05:01 UTC

05:01 UTC

3,242

58 Comments

2024/02/22

02:09 UTC

02:09 UTC

176

8 Comments

2024/02/20

16:04 UTC

16:04 UTC

52

6 Comments

2024/02/08

14:40 UTC

14:40 UTC

206

22 Comments

2024/01/28

11:46 UTC

11:46 UTC

14

1 Comment

2024/01/25

12:28 UTC

12:28 UTC

30

7 Comments

2024/01/24

10:34 UTC

10:34 UTC

208

15 Comments

2024/01/23

14:41 UTC

14:41 UTC

173

7 Comments

2024/01/21

10:43 UTC

10:43 UTC

144

13 Comments

2024/01/20

16:06 UTC

16:06 UTC

99

5 Comments

2024/01/15

20:55 UTC

20:55 UTC

65

2 Comments

2024/01/13

20:02 UTC

20:02 UTC

84

Hello, everyone!

I made these animated GIFs of electron densities in some simple molecules. I calculated the density maps with GAMESS, and plotted some shells from them with MacMolPlt. I then represented the different shells with different intensities of blurred white in the GIFs.

I tried to choose the shells reasonably, though it would have been better if I could directly plot the whole map (i.e. as an accurate blurry cloud). I'd have to look for a different software that can do that.

I represented the nuclei with points since they're much smaller than the electronic clouds. I still wanted them visible, so I made the points shine. (I could maybe shrink them a bit more.) I wasn't sure how pronounced the molecular vibrations would be at room temp in proportion their size, so the nuclei are motionless for now. I'm not sure whether GAMESS can simulate the vibrations, didn't look into it in this first run.

The animated jitters / small electric sparks are meant to visualize that the electrons can randomly interact at any of the different locations within the cloud (animated with AfterEffects). The sparks were inspired from the YouTube channel ScienceClic, who once made a similar animation to depict an atom.

I'd love some feedback if you think of things that can be improved. I made them for a future project and thought they were nice, so I wanted to share them, I hope you like them :)

I tried posting this earlier, but the GIFs were too large and didn't render in the post, so I shrunk them. Here's an Imgur Link too just in case.

[Edit] I've also uploaded the GIFs in higher resolution, along with the 3D models (the red plots from the last image, they can be explored e.g. with MacMolPlt). They're downloadable here. If you'd like to use them in your projects, simply pm me :)

2 Comments

2024/01/09

01:27 UTC

01:27 UTC