/r/physicsgifs
GIFs that show physics principles at work in the real world or in a simulation.
Welcome to /r/physicsgifs! | Post Categories | Updated CSS
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.
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/r/physicsgifs
214,393 Subscribers
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
14:26 UTC
Juggling Joules: Without Losing a Joule
14:50 UTC
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
10:48 UTC
Significant refraction from the heat of a long (~12ft) hot wire cutter used to cut sheets of styrofoam
01:48 UTC
Do Moving Objects Snap Along The Planck Length?
I say this because if it doesn’t, that means an object can move less than a Planck length, which wouldn’t make sense
19:49 UTC
Conservative Force: The No-Waste Energy Club
14:56 UTC
[SST] Asteroid impact timelapse
23:08 UTC
Movie from 1960 of the first ever computer-made N-body simulation of a galaxy
19:41 UTC
Cosmological Simulation: Structure formation in a 50 Mpc/h cube with ~2 million dark matter particles.
13:52 UTC
Instantaneous Power - Watts in a Jiffy! (A Short Story)
16:49 UTC
Shadow from car door warps toward shadow from my sleeve as they get near each other
20:19 UTC
Double Slit Experiment 3D Visualisation [Made by me in Blender Software]
05:01 UTC
External Gear Pump - Cavitation
02:09 UTC
Joules of wisdom (Work Energy and Power)
16:04 UTC
Spring Into Action with Hooke's Law
14:40 UTC
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.
11:46 UTC
Carting around with Work Energy Theorem (InvisiblePoles and Koffeeboy - i made an improved version. Thanks for the feedback)
12:28 UTC
Cart Dynamics: Work-Energy Theorem
10:34 UTC
Slinky Analysis: Square wave -> Triangle wave -> Sinewave
14:41 UTC
Sawtooth Slinky
10:43 UTC
Dynamics of a rocking disk pendulum
16:06 UTC
Jar lid oscillating
20:55 UTC
Working on Roche Limit simulations.
20:02 UTC
Pretty Illustrations of Electron Density Maps in Simple Molecules
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 :)
01:27 UTC
What is different between angular and centripetal acceleration?
10:14 UTC
Evanescent wave coupling between two fibers
Hi everyone. This is a simulation I made showing how evanescent waves resulting from the excited mode in a driven fiber can excite the same mode in a nearby fiber.
The two fibers are embedded in a lossy medium to ensure that the source doesn’t excite the second fiber. The second fiber is shorter to give more space between it and the excitation source, and also to show some unperturbed propagation in the first, driven fiber.
This simulation was created using software I wrote myself from scratch, called Maxwell. It is written completely in C, and is quite lightweight and fast. You can visit it at https://github.com/RiScJ/maxwell. If you want to run this example, it’s available at examples/evanescent_fibers.sim.
Please let me know what you think! Or, if you have any ideas for other simulations to run.
20:29 UTC
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