/r/physicsgifs

Photograph via snooOG

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

Electromagnetism

Thermodynamics

Fluid Dynamics

Light, Waves and Sound

Newtonian Mechanics

Astrophysics and Space

Nuclear Physics

Quantum Mechanics


Symbols, Superscripts and Subscripts

Superscript

  • E = mc2 is written as E = mc^(2)

Subscript

  • vo = vf - (a * t) is written as v*_o_* = v*_f_* - (a * t)

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/chemicalreactiongifs

/r/biologygifs

/r/spacegifs

/r/oceangifs

/r/physics

/r/space

/r/mathpics

/r/askscience

/r/gif

/r/gifv


/r/physicsgifs

214,996 Subscribers

588

Neutron (black) hitting Uranium 235 (blue) | Critical mass simulation

23 Comments
2024/05/17
08:31 UTC

77

Fast nano-precision piezo stages (credit: Xeryon)

6 Comments
2024/05/02
06:43 UTC

336

Fluid dynamics of soap and water

Beautiful physics in motion!

9 Comments
2024/04/20
18:22 UTC

26

An LYSO Scintillator placed, mostly out of the way, inside a type of X-Ray spectrometer made to collect XAFS and XANES data.

2 Comments
2024/04/09
13:44 UTC

2,615

GOES-16 satellite imagery of the total solar eclipse traversing North America

27 Comments
2024/04/09
02:24 UTC

205

Graph of Life

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

474

Juggling Joules: Without Losing a Joule

12 Comments
2024/03/27
14:50 UTC

5

Physics 2024 papers

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

https://www.youtube.com/channel/UCCmtUyMOf_3AmTitC3eIxMw

1 Comment
2024/03/27
10:48 UTC

69

Conservative Force: The No-Waste Energy Club

9 Comments
2024/03/15
14:56 UTC

249

[SST] Asteroid impact timelapse

15 Comments
2024/03/13
23:08 UTC

215

Movie from 1960 of the first ever computer-made N-body simulation of a galaxy

15 Comments
2024/03/01
19:41 UTC

108

Cosmological Simulation: Structure formation in a 50 Mpc/h cube with ~2 million dark matter particles.

7 Comments
2024/02/29
13:52 UTC

24

Instantaneous Power - Watts in a Jiffy! (A Short Story)

0 Comments
2024/02/27
16:49 UTC

1,405

Shadow from car door warps toward shadow from my sleeve as they get near each other

67 Comments
2024/02/22
20:19 UTC

260

Double Slit Experiment 3D Visualisation [Made by me in Blender Software]

5 Comments
2024/02/22
05:01 UTC

3,242

External Gear Pump - Cavitation

58 Comments
2024/02/22
02:09 UTC

176

Joules of wisdom (Work Energy and Power)

8 Comments
2024/02/20
16:04 UTC

52

Spring Into Action with Hooke's Law

6 Comments
2024/02/08
14:40 UTC

206

The electromagnetic field from the plasma ball causing a strip light remote to turn the light up as I move my hand close. Neat little (accidental) experiment.

22 Comments
2024/01/28
11:46 UTC

14

Carting around with Work Energy Theorem (InvisiblePoles and Koffeeboy - i made an improved version. Thanks for the feedback)

1 Comment
2024/01/25
12:28 UTC

30

Cart Dynamics: Work-Energy Theorem

7 Comments
2024/01/24
10:34 UTC

208

Slinky Analysis: Square wave -> Triangle wave -> Sinewave

15 Comments
2024/01/23
14:41 UTC

173

Sawtooth Slinky

7 Comments
2024/01/21
10:43 UTC

144

Dynamics of a rocking disk pendulum

13 Comments
2024/01/20
16:06 UTC

99

Jar lid oscillating

5 Comments
2024/01/15
20:55 UTC

65

Working on Roche Limit simulations.

2 Comments
2024/01/13
20:02 UTC

84

Pretty Illustrations of Electron Density Maps in Simple Molecules

H₂

H₂O

CO₂

CH₄

NH₃

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 :)

Original MacMolPlt Plots

2 Comments
2024/01/09
01:27 UTC

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