search results matching tag: double slit experiment

» channel: learn

go advanced with your query
Search took 0.000 seconds

    Videos (8)     Sift Talk (0)     Blogs (1)     Comments (50)   

Is This What Quantum Mechanics Looks Like? - Veritasium

dannym3141 says...

To be fair, you were taught this in school if you were taught wave particle duality and the double slit experiment. Look at this. Now imagine a particle bouncing along in very small steps (quantum leaps if you will), and the direction it goes depends on the strength and orientation of the wave where it lands. You may never have been told to think about it like that, but that's what makes physics so amazing that sometimes all it takes is for someone to think about it slightly differently. The information was there all along, but who would imagine the 'particle' bit of an electron interacting with the 'wave' bit - the electron interacts with itself?

I absolutely love it, it's amazing, and simple and beautiful. It may provide insights into new ways we can model quantum behaviour, it might open up new questions to ask.

There's things I'd like to know. First, if the standing waves generated at each step in the droplet's progression interact with each other, the droplet is reacting according to waves it made in the past - what implications does that have for the notion of real particles in a spacetime continuum? For the double slits experiment to work in that model - in the ball on a rubber sheet sense - the sheet would have to stay warped to some extent after the ball had passed. In the quantum sense of the real double slits experiment, we would say it IS a wave, passes through both slits and appears according to statistical probability (the diffraction pattern).

Presumably several droplets released along the same path would go on to take a different route through the slits, to create a diffraction pattern as it must. Perhaps because of fluctuations in the temperature or density of the water at different locations? Is that a limitation of the model or an indicator about the nature of the fabric of spacetime? Perhaps even due to quantum fluctuations in the water particles - the water is never the same twice even if its perfectly still each time - which would potentially mean we're cyclically using quantum mechanics to explain quantum mechanics and we actually haven't explained very much.

The philosophy bit: But this reaches to the heart of the issue with quantum mechanics and perhaps science in general. How accurately can we model reality? The reality is beyond our ability to see, so we can only recreate simpler versions that are always wrong in some way... our idea of what happens - our models - can never be 100% because only a particle in spacetime can perfectly represent a particle in spacetime.

Scientific results and definitions are always defined with limits - "it works like this, within these confines, under these conditions, with these assumptions." There are always error margins. We are always only ever communicating an idea between different consciousnesses, and that idea will never be as true to life as life itself.

Sorry for the wall of text, it's a great and provocative experiment.

TheFreak said:

I hate quantum mechanics and the absurd implications that extrapolate from it. I always believed that one day we would look back and laugh at how wrong it was. Turns out a more reasonable competing theory has been there all along. Why was I not taught this in school.

I get that it's just another theory and that quantum mechanics can't be judged based on intuition that comes from our interaction with the macro world. Still...fuck quantum mechanics.

How to DMT

newtboy says...

The best way to reduce risk from taking, or getting caught with DMT is to not do it.

I'm glad to hear him at least mention negative effects, but he just glossed over them. In a video like this, I think the negative possibilities, physical and mental, need FAR more time and attention.

I do agree with him in that, if you are not certain this type of experience is for you, just don't do it. The mental/psychological damage can be severe and permanent. I also think it's a good idea to start with a tiny dose and build up if you MUST do it...but still not "safe".
That said, as a black market drug, you never know how pure what you have is, or what it's mixed with, and also the method you use changes the amount needed for effect. Simply saying '5mg is a good start dose' ignores all these facts.

Smoking steel wool, even course steel wool, can destroy your lungs. First, it's not pure, clean steel. Second, even the course steel wool partially vaporizes (fine steel wool will just burn, completely vaporizing). Steel vapor and lungs don't mix. Use glass.

His suggestions to use the drug in public (in the woods or at the beach) are TERRIBLE. I understand his thought process in suggesting peaceful environments, but if you're doing schedule 1 drugs, do them at home. This drug is IMPOSSIBLE to pretend you aren't on, or to act 'sober' while tripping, and if people see you on it and don't know what's happening (or maybe even if they do know), they'll almost certainly call the police. Getting caught with DMT is likely to ruin your life.

The quantum physics double slit experiment describes how light behaves under certain conditions, not how normal matter behaves...and also, atoms aren't made up of electrons, they're almost entirely protons and neutrons by weight. He should have stopped at 14 min. in my opinion. The rest made him look slightly insane and like he speaks with authority about things he doesn't understand very well.

I'm still waiting for the insightful invention someone comes up with after one of these amazing 'conversations' with non-human beings. If this drug really did what those into it claim, you would expect most users to be incredible 'outside the box' inventors advancing science in ways normal people would never consider...but I have not heard of even a single instance of that kind of useful insight coming from DMT.

Purpose and the Universe by Sean M. Carroll

robdot says...

All of "reality" exists only as waves of probability until measured, or, observed. This is the conclusion drawn from the double slit experiment. There is no painting.

Deano (Member Profile)

robdot says...

All of "reality" exists as waves of probability until measured, or, observed. This is the conclusion of the double slit experiment.

Deano said:

Interesting talk that I enjoyed a great deal, though I wonder if that was more for the quality of his delivery rather than the material.
It was interesting to learn about reality being wave-based and our perception is that of the particle. e.g the EM wave that is light we see as particles we call photons.
Also I do believe Dawkins was there at the end asking a question.

What Can Frogs See That We Can't?

rich_magnet says...

So if a single photon from a distant star passes through the slit-like pupils of the frog's eye the question is: which slit does it pass through? And what retina does it impinge on?

This is actually a trick question, easily answered by the experimental results of the famous double-slit experiment.

Also, I'm disappointed. I was hoping to learn about the optical/visual system of frogs.

aaronfr (Member Profile)

What Is Light? Young's Double Slit Experiment

siftbot says...

Tags for this video have been changed from 'light, wave, particle, newton, young, street science' to 'light, wave, particle, newton, young, street science, double slit experiment' - edited by xxovercastxx

Heisenberg's Uncertainty Principle Experiment - Veritasium

messenger says...

It's the only one I've ever seen demonstrated practically, without cartoons or diagrams. Now I'd like to see the double-slit experiment.

TheGenk said:

That has to be the most comprehensible explanation/demonstration of Heisenberg's Uncertainty Principle I've ever seen.

Quantum Physics Double Slit Experiment - amazing results

Dr Quantum - Double Slit Experiment

Dr Quantum - Double Slit Experiment

Dr Quantum - Double Slit Experiment

Dr Quantum - Double Slit Experiment

Dr Quantum - Double Slit Experiment

Quantum Physics Double Slit Experiment - amazing results

sme4r says...

Where did this guy go? I like his thought process before he goes off on a multi-comment rant.>> ^Cronyx:

(I split the following up into a few posts because it was too large.)
I don't claim to be an expert, or an authority on this stuff. I will say that I've been fascinated by it on a personal level for over ten years. It started back in the ZDtv days (before TechTV), when Michio Kaku was on an episode of Big Thinkers. I read anything I can get my hands on, and watch all material that comes my way.
Take the following for what it's worth, I'm not trying to proselytize an agenda, just share some of my private thoughts.
I've got a number of analogies I could use here for describing the entire (11 dimensional) universe. Two of my favorites are a VHS tape and hologram baseball card. They both kind of work the same way in so far as how they relate to the thought experiment. I'll explain both.
In the case of the VHS tape, it has your favorite movie on it. You know it word for word, line for line. You've seen it a hundred times. But no matter how many times you watch it, the story will always end the same way. But, from the point of view of the characters (I'm talking in a 4th wall sense; the characters themselves, not the actors playing them), have no idea what will happen next. In fact, the same was true for you the first time you saw the movie. There may have been some foreshadowing, but hell, there's some of that in real life too.
The point is, with the tape, you can fast forward, rewind, pause, browse the timeline however you choose. But the characters are oblivious to this. You aren't really manipulating their timeline, you're just browsing it for your own perspective. If you eject the tape though, you're holding the entire timeline. You've collapsed their universe into a 3 dimensional object. It only has a 4th dimension when you put it in the VCR. When you watch it. But even during the novel first experience of the initial viewing, the end of the story was there. It was always there, predetermined at the end of the tape.
On to the baseball card for a moment. Now, given various factors in the developing process, that hologram card has a lot more information than what you can see at one time, flat on. You have to tilt it one way or an other to get a different view -- to access more of the data. And yet, viewing the different angels don't create that data. Knowing they're there doesn't make them exist. It only makes you aware of them. Holding the card, you still hold all the potential that image has all at once, in that one object, even if you can't be privy to it all at once.



Send this Article to a Friend



Separate multiple emails with a comma (,); limit 5 recipients






Your email has been sent successfully!

Manage this Video in Your Playlists

Beggar's Canyon