Heisenberg's uncertainty principle

[spade0655]

I WANT YOUR BRAIN:-P

[lukzorreid]

uuuummm hmmm i agree



[Ebvardh]

God damn it!

[QuarksLeptons]

You are just like any book, you explain what will never be in use!!!!!

[mewantremote]

@QuarksLeptons Time travel.

[Wittgensteinism]

so for an experiment like the double slit experiment where measurement of a particle typically collapses the wave function, does this mean that the wave/particle duality is resolved by whether or not you're measuring the location versus the velocity of the wave/particle?

In other words, can you only measure velocity in terms of a wave function, and only measure location in terms of a point particle?

Does the Uncertainty Principle have anything to say about the wave/particle duality?

[Huttate1]

@Wittgensteinism A much simpler way to consider that question it is by looking at de Broglie's works. In summary, how 'matter' behaves depends upon the scale of the measurement. As an example. If we look at a hydrogen atom using current techniques it appears to be a particle. But if we were able to probe it with something of a much smaller diameter than that of the hydrogen atom we would begin to see the inner workings of the atom.

[Wittgensteinism]

@Huttate1 "how 'matter' behaves depends upon the scale of the measurement."

Are you saying the way in which we perceive matter to behave depends upon the scale of our measurements, or are you saying that matter itself behaves differently depending on how we choose to measure it? In other words, how does matter behave when it's not being measured? Is it our particular type of measuring device determine merely what kind of measurements we can make, or does it determine how the matter behaves?

[Huttate1]

@Wittgensteinism Should have said 'appears to behave'.

It appears to behave as a wave until you can see it at extreme resolution. That is when you see it behaving as a particle.

The big issue is that using current technology we are very clumsy when we try to look at it closely and so our very act of observance [bombarding it with photons say] affect the behaviour of the individual particles.

[Wittgensteinism]

@Huttate1 I seem to remember reading about either Heisenberg or Bohr saying that this Uncertainty Principle isn't simply a failure of our instruments to be able to measure e. g. the position of a particle without physically disturbing it and therefore collapsing the wavefunction (thus manifesting as a point particle) but a fundamental law of the quantum world that our technology, no matter how advanced, could ever violate. The core question is: how does it behave when we're not observing?

[Huttate1]

@Wittgensteinism As best we know it behaves probabilistically. The wave function can calculate the probability of an electron being in any position in a shell and it appears to be where the wave function predicts. But quantum tunneling proves that it is not always where calculated. And it is quantum tunneling that allows the sun to shine.

[hawkinscraig05]

I personally think that something more fundamental is going on, that physicists haven't discovered yet. The idea of a superposition of probabilities, until an observer collapses the wave function is too bizarre, physicists are left buying into the many worlds theory or the Copenhagen interpretation... I don't buy either... I'm not of course saying that physicists necessarily buy into those interpretations, but they have to think in those terms to do the physics, especially if they are theorists.

[stan021]

h is reduced plancks constant, this is ok , but I found that minimum uncertainity is 5 x 10-26 m, not 5 x 10-6 m. thank you for a very nice explanation.

[rifliflih]

Pour ceux qui veulent traduire moi je dis bravo quoi qu'étant nulle en maths!

[frost122585]

It is the greatest discovery and revelation in the history of physics.

[77LCJ]

Thank you, finally got it without brains dribling out of my ears!

[lexsite]

Very well explained especially for someone like with a non science background. Thanks.

[VladimirFedorov]

ΔxΔp ≥ h/4pi bitches!

[osamaisathawadi]

fantastic explanation of the uncertainty principle.

thanks for sharing

[yeterbiktim]

thank you.. easy to understand even for a person with the background of social sciences like me...

[sympaticomember]

thank you

[barbers08]

marijuana

[DubbleLzNhell]

What does "H-Bar" mean? So just the H-Bar symbol alone in this equation is equal to the plank's constant divided by 2-pi? And then divided by 2?

[Prankster330]

@DubbleLzNhell It is just H divided by 2-pi

[Redant1Redant]

A great explaination.

[cloaknpoke]

Very fitting the symbol of Neptune is used to represent a wave in frequency.

[nickharvey7]

In my video The Paradox of Schrodingers Cat an artist view Time has symmetry and geometry. Could the Uncertainty Principle be formed by the forward motion of time? If time was formed by the emission and absorption of light or EMR from atom too atom this would give us probability.

[ProsperosCloset]

A very clear explanation.

[BigNewGames]

I thought Heisenberg's Uncertainty Principal was only meant for estimating a particles position based on it's wave sine. Does the graph show the particles location at 0 to always be located somewhere 90° of the x axis or 2d ground?

[sakriyaronaldo]

why exact position and momentum of electron cant be known.

[gvsfgdf]

because when u observe the electron the light hitting it moves it...

[klegendk18]

@gvsfgdf wrong, that is the simple chemistry explanation. heisenberg based his principal off the math surrounding it, the math it why we are uncertain of both at the same time... 7 people who liked that are all idiots

[goodbyelonglive44]

@sakriyaronaldo it seems because it acts both like a wave and a particle and "exact" makes no sense in quontum world. I am a new comer to the subject infact last night. if you want resources I have saved some.

[pikachun00b7]

Thank you!