Added: 3 years ago
From: TrungEdm
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  • Is that the guy that can draw dotted lines in 0.5 seconds? He's awesome.

  • MIT bro. Some of the comments here speak of god like a grumpy old man. Like they actually know what they are talkin' 'bout.

    perhaps they got their ph.d. in bs

  • Thank you 'Maplebayou1' for taking the time to respond. This is a fascinating subject and I have a lot to learn about it. Learning about it is the fun part!

  • nerrerrerr

  • but why does it become wider?

  • '...the position of an (atom) is measured by a photon....'? I thought that the 'uncertainty principle' was about the the limitations of simultaneously measuring the location/velocity of fundamental particles/waves such as electrons or photons! I respectfully request clarification re: does it apply to atoms as well? Thanks, TB

  • @tberrardy well i don't know much but i think of the experiment this way. heisenberg's principle states that the position and the momentum of a particle cannot be determined simultaneously. the more accurate the measurement of momentum is, the less accurate the measurement of position will be. here we know the velocity of the laser beam. so we know the momentum. because of that, it will now show its exact position and spreads across horizontally.

  • @mignik01 The momentum of a photon is not a function of its velocity, but its wavelength. All photons (visible and invisible) have the same velocity in a vacuum, but not the same momentum.

  • @maplebayou1 ya it comes from einsteins equation E^2= m^2 c^4 + p^2c^2 rearrange it and substitute m=0 you will get p=E/c. I might have got it wrong the first time. sorry.

  • @tberrardy The uncertainty principle applies photons, atoms, and people. The difference is that the uncertainties become vanishingly small as you move to larger objects. It is important to realize that the uncertainty principle does not prevent you from measuring the position of an object to arbitrary precision. It merely shows that to do so you would need arbitrarily high energy, and to the degree that you manage it, you will lose precision on forecasting its future position.

  • Seems misleading to not mention the "interference pattern" (which he blurs in the results). Interference patters are not "non-intuitive" at all.

  • yeah its the interference pattern thats the important bit

  • this man knows more about god then any christian.

  • I SECOND THAT!!!!

  • Just because something is non-intuitive doesn't make it relevant to god, (even though religious people are used to associating non-intuitive shit with religion)!

  • @plaxam

    He would miss God if He was in his face. Laugh

    But he will start to think if God showed up in this heart.

  • im not so sure if god was in his heart if he would see him there. maybe if he.. touched him? the way a man.. touches a boy. maybe he will cum inside him and then there would be an explosion of love.

    its funny how scientists will one day be able to understand the moment of creation. and the only way a christian will be able to see it is if he becomes a scientist. god said, let there be light. and this man understood.

  • lol you think I all ways been a christian. Matter of fact I hated them for most of my life. There is more to God then light of the big bang. explosion of love like a nuke yes, does not show up all people. God is all around him lol

  • For just a second, I was convinced that the presenter was Christopher Walken

  • if quantun physics doesn't make your head hurt you haven't read enough of it

  • If you make the slid narrover then the photons turn into waves and an interference happens? Is that what he says? It is really interesting. I want to know about it and make an experiment

  • na-ror-er and na-ror-er and na-ror-er

  • So, that's what happened to the plane!

  • So upon examining light at a quantum level, it becomes too inaccurate to be observable?

  • Is there a youtube video of the

    inverse experiment,limiting the momentum

    of the photons,red laser light?

    what would that look like?

  • sweet fuck I need a girlfriend.

  • @murtsworld666 thats right, don't think, just reproduce

  • @murtsworld666 you just read my mind. fuck

  • Im so going to use this to pick up chicks.

  • pussy na-ror-er and na-ror-er and na-ror-er ?

  • I am quite confused, I thought that light difraction could be explained by classical physics and no quantum physics was needed.

    There is another thing I have never understood about quantum physiscs: both light (photons) and matter particles are considered to follow the same rules (like the Uncertainty Principle) but they are entirely different, while light is ruled by Maxwell equations matter follows Schrodinger equation, so can we call "particles" to things that are entirely different?

  • I share your being confused. The Huygens-Fresnel principle predicts that a wide wavefront colliding into a wall with a small hole on it causes the wave to proceed on the opposite side of the wall, as the hole itself was a single source of disturbance: the waves proceeds as concentric hemispheres. This is classic physics. Or I am missing something here. ;)

  • I believe what this proves is that at increasingly smaller levels the position of any given particle becomes more difficult to predict. Hence when the beam becomes more focused, the possibility of the light landing at any particular spot on the wall becomes lower thus the beam becomes more spread.

  • thats fucking cool

  • I understand that it works but why?

  • one cannot determine the the position and momentum of particle AT THE SAME TIME. when u make the slit closer, you are now so precisily determined its position its momentum is no longer determined as accuratly, so PHOTONS (particles) will show this by SPREADING so now your cannot precisly determined the direction of any individual photon will take, only predict its PROBABILITY of going to any once place!

  • sorry, what is a momentum? just want to understand the thing completely :-) thanks

  • momentum is a physcial vector quantity defined by a particles MASS x VELOCITY. Its direction is in the direction of its velocity.

  • Your explaination and experimental demonstration is very clear and precise. Very helpful.

  • cool

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