To take all possible paths the internet has to offer, get the exclusive NordVPN deal here: https://NordVPN.com/veritasium It’s risk free with Nord’s 30 day money-back guarantee!
@MohammedramyCherif Says:
This is one of the craziest things I've ever seen
@geometerfpv2804 Says:
He doesn't understand the difference between a mathematical abstraction and reality. The paths in the path integral are not "real" any more than the paths in the Hamiltonian action integral are "real". This is woo woo quantum mysticism BS, and I'm surprised to hear it from you. It is literally the same thing as Hamiltonian mechanics, and no one thinks classical particles "traverse every path"...because it's obvious that they don't, we can literally see them.
@abhinavabhi9878 Says:
30:23 since I can see the laser source on the main camera in dark, it is throwing light in all directions (including towards main camera). So my basic logic is saying that you just reflected/ refracted/ sent the red light coming to foil portion to the mobile camera. If it was true laser, I should not be able to see source light in the main camera. Can you put like tube in front of laser source and check if we cannot see the source laser when we put third camera camera at the foil position directly, to ensure no light is coming to the foil portion.
@AndrisBankovskis Says:
Oops! Verisatium has fallen for the reification fallacy. All paths is not an ontology, but a mathematical technique. Good entertainment though
@Tile-ih1wy Says:
FIX MOJANG BEDROCK
@Noah-n4b1z Says:
because bread tastes better than key
@Anshuman18Hustle Says:
my mind blows everytime I watch this video
@Elite_Edits-h6x Says:
I thought said this was wrong
@neilcreamer8207 Says:
It's considerably simpler if you drop the assumption that photons and other quantum particles exist.
@vanivasil2718 Says:
Do you need energy to explore all possible pathways
@Rishisnature Says:
Loved the laser demo... Could genuinely feel his enthusiasm. Beautiful video. Thx. Respects. 🙏
@Fate_And_Desire Says:
idk about that light experiment... Isn't the light just going in all directions until you found something to reflect it?
@Ryd34lyf3 Says:
I'm just a Luddite, but it seems to me that once we figure out and harness gravity all physics will align.
@pedroperez3442 Says:
Here I am, simulating I understand.
@maxidu7549 Says:
Was ein Schwachsinn! Ai halt..
@HumanCuriosity-08 Says:
Such interesting concepts, even if I'm going to forget 90% of the information offered, I think the way you're explaining, there's going to be a lot of left over information that I will know because of your videos! Thanks for that!
@histrio12 Says:
If the light does all possible parts at once, shouldn't it arrive at different times, since the paths have different lengths?
@Syed_Infinity Says:
As a class 11 student from, I am doomed here
@joseph-mariopelerin7028 Says:
Idk... Its seem all a bit trivial to try understanding this any deeper,
Once an object got velocity, it doesn't have infinite directional possibilities... And if an object is stationery, well its just not worth even talking about the theory of a potential trajectories because of course they are infinite...
@yetanother4x4channel22 Says:
Action, Lagrangian, path integrals - all good stuff. Useful and powerful.
Least action and path integrals supposedly lead to the dramatic revelation that the quantum (photon, electron, whatever) takes all possible paths.
But path integrals give the same results as the use of wavefunctions. They are equivalent. They are different mathematical methods that give the same result. The wavefunction also _takes_every_possible_path_. So is the path integral the source of any unique revelation?
The word 'possible' has been used somewhat casually. Are there paths that aren't possible? I'd say so. Traversing a path through 2 km of lead is so unlikely as to be basically impossible. Or even 2 cm of black felt. You could leave that path out of the path integral without affecting the result.
The rats nest of paths that is flashed several times in the video appears mostly unphysical. Under what physical conditions would those paths be "possible"? Do we have to include a path that loops around Jupiter (or Uranus) three times? You could but it is not going to affect the results.
I don't find Casper's demonstration convincing at all. There is nothing there that requires least action or quantum mechanics to explain. You could ignore quantum mechanics, consider light to be an EM wave, do the EM wave calculations, and get the same result.
@JamesRaines-q9j Says:
Quantum physics has some figuring out to do, quantum mechanics sometimes proves or disproves that.
@lr937 Says:
Loght ain’t following nothing, not the shortest path not the fastest, light bends in water cause it has no other option, it depends on the water content, salinity, density, light has no need to follow the fastest , shortest path cause for light time is still, can do do as it pleases and will always arrive on time with a delay of zero seconds, for u might look different but even for light coming from the big bang (btw big bang doesn’t even happened but lets pretend it did) time hasn’t passed, it reached your eye And that was it, wasn’t even targeting your eye, you just happened to be looking up that particular day
@catalinp9176 Says:
You can see the laser light with diffraction gratting because at output hole of the laser you have diffused light due to light scattering on the laser edge hole, and that is what youre diffraction gratting see.
@tuo9433 Says:
What about the path of maximum action? Shouldn't we observe them too?
@aadil5903 Says:
The hubris of man, to think that we can ever fully know any topic or subject
@tomvillani Says:
The laser demo really blew my mind too. I was also surprised how excited Casper became when viewing the result of his own experiment. VERY COOL Indeed guys!! Thanks Veritasium
@qwer76009 Says:
you should do a video about co-energy. Especially kinetic co-energy wich is the actual term T used on the Lagrangian. There is a lot of confussion and misconcepcition about this.
@nananananana10 Says:
I thought all of this was very obvious, although i love your videos - it just seems so obvious idk
@Exayevie Says:
You need to explain what “explore” actually means
@Exayevie Says:
Veritasium: the student’s point was clear
Us plebs: oh ok
@ThePhenomENS Says:
Wait....so we have a link between quantum and classical physics? Why am i always the last one to know?
@victornikolov537 Says:
What about the time?
If the light explores all the paths that should happen with infinite speed
@gregwarner3753 Says:
Quantum mechanics should only be asked to work on German cars.
@mdSabbir-x6r5h Says:
I spent years trying to understand manifesting, but it always felt like I was missing something. Eventually, I came across Vera Hart’s archetype quiz and decided to try it. My result was surprisingly accurate and helped me understand which approach actually suits me. Definitely worth trying if you’ve been feeling stuck too. It only takes a few minutes ❤️
@mdSabbir-x6r5h Says:
https://www.youtube.com/watch?v=qJZ1Ez28C-A
@nurullah733 Says:
About 5 years ago, one of the asistant told me ML is a complete filed
@ItsBingoLingo Says:
Off topic to say, but you read all this in higher detail in high school chemistry IN A SINGLE CHAPTER here in India
@bmwolfe2786 Says:
20:00 What's so special about moving?
Even just sitting still, am I technically going every possible place and then just coming back to where I was?
@jakubolszewski8284 Says:
World is amazing.
@kapriolenpfeifer Says:
Still not very convincing experiment. You could just place a right ankled reflector there and see the light and laser.
@josty_7 Says:
Is it not just because the waves are spherical and ray paths are just a simplification ?
@Athakaspen Says:
The more I hear about quantum mechanics, the more I want to believe we're still another breakthrough away from a less explosively complicated explanation. But that's why I'm glad so many people are putting in work both academically to push the boundaries, and on videos like this to get more average people thinking about it.
@Lich0_0 Says:
Lazy ahh universe. "Path of least action" lul
@paolomontoya-x1c Says:
I watched again to understand
@averyellis Says:
What was with the attitude of the late 1800s that everything had been discovered? From Plank’s professor to the Patent Office declaring there were no more inventions to be had, it’s like they thought they were at the pinnacle of modernity.
@esotericpince Says:
12:23 big fan of this guys appearance and demeanour. he has a very engaging voice hehe
@photon6668 Says:
What if all the particle-like behavior is emergent in nature?
@gonzaloa.moreno99 Says:
Infinitas rendijas, infinitos caminos posibles, eso es equivalente a una red (lattice) de nodos cuánticos. Los infinitos caminos posibles son solo una interpretación matemática (aproximación) de una lattice Green function
@TheMrJizzus Says:
29:10 why do I feel like all scientists have lasers lying around in their homes?
LATEST COMMENTS