Does light take all possible paths at the same time? 🌏 Get exclusive NordVPN deal here ➵ It’s risk free with Nord’s 30 day money-back guarantee!✌
A massive thank you to Dr. Andrew Mitchell for all his help and expertise. If you want to delve further into this topic then we highly recommend his lecture on Classical physics derived from quantum mechanics:
We’re incredibly grateful to Prof. David Kaiser, Prof. Steven Strogatz, Prof. Geraint F. Lewis, Elba Alonso-Monsalve, Prof. Christopher S. Baird, Prof. Anthony Bloch, and Prof. Stephen Bartlett for their invaluable contributions to this video.
A special thanks to Mahesh Shenoy from FloatHeadPhysics for his help with this video. Check out his excellent intuitive video on the UV Catastrophe here (Sep 2024):
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0:00 What path does light travel?
2:40 Black Body Radiation
6:47 How did Planck solve the ultraviolet catastrophe?
9:42 The Quantum of Action
13:25 De Broglie’s Hypothesis
15:16 The Double Slit Experiment
20:00 How Feynman Did Quantum Mechanics
25:01 Proof That Light Takes Every Path
31:16 The Theory of Everything
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Sign up to our Patreon to submit your Q&A questions:
Try Snatoms! A molecular modelling kit I invented where the atoms snap together.
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References:
Armin Hermann (Nov 1974). The Genesis of Quantum Theory (1899-1913). –
Richard P. Feynman (1985). QED The Strange Theory of Light and Matter. –
A fantastic book on the history of the Principle of Least Action: Rojo, A. and Bloch, A. The
Principle of Least Action: History and Physics. –
Coopersmith, J. (2017). The lazy universe: an introduction to the principle of least action. Oxford University Press. –
PBS Space Time. (Nov 2021) –
Sabine Hossenfelder. (May 2022) –
Max Planck (1901). On the Law of Distribution of Energy in the Normal Spectrum. Annalen der Physik –
Paul Ehrenfest (1911). Welche Züge der Lichtquantenhypothese spielen in der Theorie der Wärmestrahlung eine wesentliche Rolle?. Wiley Online Library –
Nils-Erik Bomark and Reidun Renstrøm (Aug 2023). The Ultraviolet myth. Proceedings of Science –
Planck’s law. In Wikipedia –
PBS Space Time. (Jul 2017). –
Einstein and The Photoelectric Effect. (Jan 2005) via APS News –
Louis de Broglie (1924). On the Theory of Quanta. –
Larry Sorensen (2012). Path Integrals 1. University of Washington –
Feynman’s Method of “A Particle Exploring All Possible Paths”. (Mar 2018) via Pure Dhamma –
A great intuitive video on the Feynman path integral approach –
Origins of Quantum Theory. via University of Pittsburgh –
Images & Video:
Nobistor Altona 1880 via NDR –
Edison incandescent lights by William J. Hammer via Wikimedia Commons –
The full expanded form of the Standard Model Lagrangian by Chen Ning Yang et al. via Wikipedia –
Muon Ray. (2011).
Muon Ray. (2011).
Bohrs Atomic Model via EEEGUIDE.COM –
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Special thanks to our Patreon supporters:
Adam Foreman, Albert Wenger, Alex Porter, Alexander Tamas, Anton Ragin, Autodidactic Studios, Balkrishna Heroor, Bertrand Serlet, Blake Byers, Bruce, Dave Kircher, David Johnston, David Tseng, Evgeny Skvortsov, Garrett Mueller, Gnare, gpoly, Greg Scopel, Juan Benet, Keith England, KeyWestr, Kyi, Lee Redden, Marinus Kuivenhoven, Matthias Wrobel, Meekay, meg noah, Michael Krugman, Orlando Bassotto, Paul Peijzel, qiaohui wei, Richard Sundvall, Sam Lutfi, Tj Steyn, TTST, Ubiquity Ventures, wolfee
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Directed by Casper Mebius
Written by Casper Mebius and Derek Muller
Edited by Trenton Oliver and Peter Nelson
Animated by Fabio Albertelli, Mike Radjabov, Ivy Tello, Andrew Neet and Emma Wright
Illustrations by Jakub Misiek, Tommy A. Steven and Cainejan Esperanza
Filmed by Derek Muller and Casper Mebius
Produced by Casper Mebius, Derek Muller, Rob Beasley Spence, Gabe Strong, Geeta Thakur, Emilia Gyles, Zoe Heron, Emily Zhang and Tori Brittain
Thumbnail contributions by Ignat Berbeci, Ben Powell, Jakub Misiek, Ren Hurley, and Peter Sheppard
Additional video/photos supplied by Getty Images and Storyblocks
Music from Epidemic Sound
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So, is the speed of light the time it take light to travel a set distance, or … is the speed of light the time it take to make the calculation to determine which path it's going to take? Think about it ;)
I discovered that the experiment shown in the video can be easily replicated by looking at the reflections from a light on a reflective laptop screen. They contain a polarizing filter that probably are similar to the special grid foil in the video.
Wow hats off to you man. You have shown me there is so much to learn and so much to love.
/watch?v=eN10lzVpgtw
Something Stupid will happen if you trust veritasium
Illusion is just a lack of understanding.
Our consciousness works the same way, its about the "Awareness".
Our consciousness is Non – Local, Were like a cell phone using the internet but not creating the internet for a modern metaphor.
Meditation brings awareness to the Mind and the unified nature of energy and information.
The Paradox beyond Language and quantifiable data. Yet the understanding of the feeling.
Superposition is everything between 0-1 God is everything and nothing.
Those that don't know, don't know. Those that know, indulge.
The demo was so bad, very confusing. The lights reflecting off the surface which has many minuscule lines , yes than of course the light will reflect off of those and scatter, even for sharp laser. Doesn't seem like a question experiment.
1:27 while i calculated that, my friend found every way to drown..
Why tho?
Idk I’m a dummy so I didn’t really get it. You say we see just the least action thingy, so if you took the black cover off with the laser, we would see only the light from the laser pointer and not from/on(?) the film placed on top of the mirror?
What is your opinion about the rope theory of everything of bgaede?
in the demo, would the reflections seen through the little foil be traveling at a speed different than light since the distance traveled is different, or would it be arriving at the camera at a different time?
21:30 wth are these arrows and squares? Am I suppose to know what’s going on here?
Theory and reality do match. One is ideal. Perfect conditions. Or, messy when it comes to time. Why think offspring when never wanted?! Hope in you why persist.
That's mind-blowing 😮😮😮
So on other hand if this is how everything works.. this means that no matter how infinites of me ever existed … My actions or maybe decisions would lead to the same path I am now
So it means no matter what choice I make it's always the right choice so in the end …We all have to be proud of our choices some way (within the law of course) because like that light we made our choice what we thought it would be the best path on our life at that time.
Hi. I'm a student working towards a BAS in Artificial Intelligence. Neural Networks are basically universal function approximators which can be likened to finding the least action to reach a goal. This is fascinating.
i don't think light has a destination b, like humans it just goes
Well played with that ad. Well played 😂
Its the physics system that needs you to believe in it enough for it to work
I swear there was someone who made this video before him and now its being drowned in the algorithm from his video…. : ( anyone know the vid im talking abt you should lmk 👍
Hey, engineers and scientists, think about this:
While you’re watching this video in the USA, I’m watching it in Germany, others in India, China, or Africa. And while we all share the same thought—“Wow, science is amazing, I love learning, this world is incredible and exciting, and we should all explore its wonders together”—at this very moment, there are people who have never cared about science. Never about physics, chemistry, biology, language, culture, art, or history. Never about philosophy or psychology. Never about yesterday or tomorrow. Never about the meaning of life or the end of the universe, about what came before or what will come after.
There are those who simply want to be loud and strong, dominant and powerful. Who want to humiliate others and look down on them. Who crave power, money, and control. And right now, they are thinking about how to suppress us—the ones who are too smart, too empathetic, too forward-thinking. They are thinking about how to shape this world into a place for the simple, the ignorant, the brutal.
They despise our thoughts because they cannot understand them. They despise the culture of other nations because they don’t even understand their own. They despise art and science because they only grasp the simplest things in life.
And if we don’t pay very, very close attention, they will win.
Because they don’t care about suffering, sorrow, weakness—or a single human heart.
Because they don’t care about values, laws, principles, or the moral achievements of history.
Because they don’t care what our ancestors fought and died for—unless it serves their own power.
They don’t care about rights unless they themselves are in the right.
They don’t care about faith, love, and hope unless they can profit from them.
Scientists. Thinkers. Artists. Lovers and dreamers. Those who hope and believe.
The moment is now. No one knows what tomorrow holds, but each of us determines its direction.
Even the smallest butterfly’s wingbeat has an impact.
Be the change you want to see in this world.
Be the future.
Don’t become part of a past that your descendants will regret.
Time is running out…
Does the light intensity change with more observable paths?
Didn't you already explain this with your video on entropy
that guy's mirror experiment didn't explain anything to anyone but himself
Wow
this is not that simple
when you get all possible reflection from surface of CD or DVD you will got same interference term on all pixel of camera [CCD] … so the interference pattern would disappear… but not this happens in reality
It's this theory perfectly match with a theory of elements stability in chemical reaction.
In a chemical reaction every possible product is created but the most stable element is visible in the end as they are on the maximum quality.
It’s not chance, but “law unrecognized”, that this video found me. Synchronicity is a beautiful thing.
"As for the sky, He raised it ˹high˺, and set the balance ˹of justice˺" (surah ar rahman , ayat no.7)
Light is basically spamming.
"Everything explores all possible paths". Is "exploring" free? Why? What do things like "energy" mean when an infinite number of paths are _actually traversed_?
He hides the laser behind the other bulb. When it barely is visible, you can see a light at the tip, meaning the laser light is not "pure" and spreads out from the tip perhaps from a glass lens in the laser. I'd believe it better if the laser light went through a short black pipe first to filter out the bit of spread from the lens and tip of the laser. Plus, how do you know the light is not reflecting off of the sides of the groves in the grating?
i see you finally embraced it, congrats
Reality seems more Bizzare than fiction, mind-blowing
Hello there! I'm happy that you tell about this idea of self-cycled toroid-attractor, but where is simple idea? Why you dumping a lot of math without simple vizualization? I know that you feel it, but I didn't find it here :(
It’s interesting to see the correlation when explaining phases and frequencies in this video and that these same terms are used when identifying the phases of brainwaves like lambda waves and their frequencies whether beta alpha theta or delta!! 😌 pretty cool!
Exploring all possible paths at once must mean exceeding the speed limit C. Even probabilities are not meant to do that – but somehow they do.