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Questions tagged [wave-particle-duality]

Use this tag for questions relating to the "wave-nature of particles" or the "particle-nature of waves" as they are often discussed in quantum mechanics, where a single object has properties of both classical particles and classical waves.

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De Broglie Wavelength of a particle at the turning point of a fountain

If you think about an atom which is launched in some kind of straight fountain, upward in the gravitational field. At the turning point the velocity and therefore the momentum of the particle seems to ...
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Some thoughts on Wave particle duality [closed]

The double slit experiment proves that electrons are in fact waves but if you try to measure it--- hit it by a photon--the wave function collapses and it behaves as a particle. The human brain cannot ...
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What are the similarities/differences between the behaviors of Quantum particles and bouncing droplets? [duplicate]

Bouncing droplets on a fluid surface show many weird behaviors of the quantum world. Look at this for example: https://arxiv.org/abs/1307.6920 They can show tunneling, double-slit interference ...
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Are phase and particle (photon) number in QED conjugated variables?

I found in A. Zee's book "QFT in a nutshell" (1.edition) the interesting relation (8) respectively (9) in chapter III section 5 (p.173) which states that in a collective of non-relativistic bosons the ...
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$E=hf$ true for all implies $E=pv$ true for all?

In the answer to this question: Can I apply $E=hf$ to a particle having mass? It was stated that $E=hf$ is true for all particles. If so, doesn't this imply that $E=$momentum x velocity is true for ...
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1answer
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Wave particle duality and gravity

Is a particle's center of gravity at the center of its wave function or is it where we would measure the particle to be? When we measure a particle does its center of gravity shift to where the ...
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1answer
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Does (Tomas) Bohr's modified double slit argument really doom Couder's quantum/classical fluid dynamics analogy?

I'm just an amateur, probably why I find the de Broglie/Bohm/Couder approach to QM compelling. But Copenhagen struck back: in a coincidence, Bohr's grandson is a fluid physicist who claims that ...
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Is a light pulse equivalent to a burst of photons

Reading about photons you get all sorts of weird statements like "time is frozen for a photon", "the photon dies the instant it is born" and "the photon is everywhere and nowhere", etc. Probably these ...
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How exactly does the intensity of light affect photoelectric phenomena?

We were taught that the intensity of light is equal to the rate of flow of photons per unit area times the energy of each photon(planck’s constant times its frequency) then would that mean the ...
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In the double-slit experiment of electrons (observed by photons), is it correct to say the collapse is caused by the momentum of the photons?

I'm working off the article, The Double Slit Experiment Demystified. Disproving the Quantum Consciousness connection. I think it's well-written, but I'm not convinced about this part: So what is ...
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In the double-slit experiment, why is it never shown that particles may hit the space between or outside the slits?

In depictions of the double-slit experiment that model the photon or electron as a particle, i.e. when attempting to measure which slit the particle passes through, it always shows the particle ...
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Something strange in the quantum Ghost imaging experiment

In his paper, Strekalov, D. V., Sergienko, A. V., Klyshko, D. N., & Shih, Y. H. (1995). Observation of two-photon “ghost” interference and diffraction. Physical review letters, 74(18), 3600., they ...
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6answers
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Wave behavior of particles [duplicate]

When people say that every moving particle has an associated wave, do they mean that the particles will move up and down physically, for example when we say that a moving electron has a wave ...
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What is the wave nature of particles? [duplicate]

Is the wave longitudinal or transverse in wave particle duality?
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3answers
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Are particles and waves separate entities? [closed]

Can this be proven incorrect: Particles and waves are separate entities. Waves are the energy mechanism that transports the particle but not part of the particle itself. If a photon gets created the ...
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1answer
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Quantum tunneling/transmission through an infinite potential

In Shankar exercise 5.4.2 we consider the reflection and transmission of a wavefunction through a delta potential $V(x) = aV_0\delta(x)$. I understand that to mean that the potential is zero ...
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1answer
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Bohm's view of double-slit experiment, wave-particle duality

I gather that Bohm denies the notion that the act of measurement decides whether a photon will be a wave or a particle. Bohm's idea seems to be that the photon is always a particle with a real ...
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Alternative Delayed Choice / Quantum Erasure Experimental Configuration

In every experimental setup of the Delayed Choice and Quantum Erasure experiment that I've seen, the choice of what complementary property to measure or whether to include the second beam splitter ...
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What is the wave nature of electron? [duplicate]

Is electron a standing wave or a probabilistic wave? or is it both? can someone explain me also what wavelength we calculate from de Broglie's equation? also does electron spin around itself? or is ...
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1answer
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what kind of information is shared between entangled particles [closed]

when two entangled particles are separate by distance . what exactly happens to them , that influence us to consider they connected each other?
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3answers
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Two in-line double-slit experiment [closed]

Say you have the classic double slit arrangement for electrons with detectors at the slits to determine which slit an electron passes through. Then the electrons will act as particles after passing ...
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0answers
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Are there wavefunctions that don't get more localized as we go backwards in time? [duplicate]

Gaussian wave packets spread as the time passes, which means that as we go backwards in time they get more localized. Therefore, Gaussian wave packets introduce less uncertainty in the position as the ...
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2answers
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Electrons are interfering with what?

In a two slit experiment, We are able to see the interference pattern on the screen even if the apparatus shoots one electron at a time, ie.- there is no way that the electrons are interfering with ...
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1answer
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Reasons behind de Broglie hypothesis

What reasons does de Broglie had when he proposed the idea that electrons behave like waves?
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2answers
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If electrons are waves, how do they repel each other? [closed]

Louis de Broglie said that electrons are waves. But how they repel each other?
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What is the frequency of a photon?

During emission spectrum $$\Delta E=h\nu,$$ where $\nu$ is the frequency. All books write that it is the frequency of photon, but photon is a particle and not a wave. More than that what this ...
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1answer
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Is any particle's energy quantized?

In the above picture, the author is trying to summarize the correlation between particle and wave packet. In doing so, he assumes that frequency is related to energy as: $E=h\nu$. Is this apparent ...
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4answers
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If we can say that the probability of finding an electron is 0.9 at point x, how does this tie in with the fact that an electron is a wave?

Shouldn't the electron be everywhere because it is a wave? Or am I wrong, an electron is not a wave? It just has an associated wave function that determines where it might be?
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2answers
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De Broglie Wavelength interpretation

I've just started learning about the double slit experiment (just in the short appendix section in Schroeder's Thermal Physics), and I'm extremely confused by this one thing: In it, out of basically ...
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Would the double slit experiment still yield the same results if the electron were travelling really slowly?

And I mean really slow. I don't know how this would even be done, but just a thought experiment. To explain why I ask this, the way I understand the phrase "we can't know the momentum and position ...
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4answers
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Why do cylindrical waves create an interference pattern (and sphericals do not)?

I have read this: https://phys.org/news/2011-01-which-way-detector-mystery-double-slit.html It says that elastic scattering creates cylindrical waves, and that creates interference pattern, and the ...
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4answers
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Quintuple slit experiment

What would be the outcome of conducting the following modified double slit experiment? Take the normal double slit experiment with a detector on the double-slitted wall, and behind it, add a second ...
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2answers
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Why doesn’t simultaneous wave particle observation collapse the wave function?

My question is pretty much as the subject suggests. Recently Fabrizio Carbonne and a team from EPFL have managed to image the wave particle duality of light. I thought however that this was a ...
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What's the significance of the nickel crystal in the Davisson and Germer experiment?

Davisson and Germer, in 1927, conducted an successful experiment to prove the existence of matter waves. What's the meaning of using the nickel crystal? I mean, why didn't they use any other materials?...
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1answer
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Can elementary particles be confined to a smaller region then their Compton wavelength?

I have read this question: Elementary particle (electron) and non-elementary (proton) spagettification and the comments where it says: But no real elementary particle can be confined in a region ...
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Does Wave-Particle duality exist at high speed?

I know that relativistic DeBroglie wavelength is given by $λ = h/γmv$. And $γ ≥ 1$, so at higher speed $λ$ will get shorter and shorter, does this mean it will start behaving like a particle and wave ...
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Particles vs fields

I've been reading the book "The Standard Model in a Nutshell" by Dave Goldberg and I'm confused by the notion of a particle. Case 1: Suppose that $\phi$ solves the Klein-Gordon equation, i.e. $(\...
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1answer
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Considering the wave nature of electrons, is it possible that doppler effect can apply on electricity too?

Just as light and sound in the form of waves can be explained with the doppler effect, I was thinking since electrons can also be thought of as waves, and since electricity is the flow of energy (or ...
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Distinction between actions of fields vs. waves

When a magnet attracts a nail, it is an action of a field. However, wehen electrons move in a radio antenna, it is an action of a wave. At the quantum level, we often hear that an electromagnetic wave ...
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Why are photo electrons emitted instantly from metal surface just nanoseconds after the light falls upon it?

Why are photo electrons emitted instantly from metal surface just nanoseconds after the light falls upon it? How does the quantum theory of radiation explain it? Why can't classical physics explain ...
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1answer
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Could mass also experience a form of gravitational redshift?

Main question Gravitational redshift for photons are a wellknown phenomena where the electromagnetic radiation is reduced in frequency and thus the wavelenght is increased. The wave–particle ...
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Are EM fields made of photons or are they fundamental?

I have read these questions: Virtual photon description of B and E fields How do virtual photon cloud produce discrete magnetic field lines in bar magnet? How virtual photons give rise to electric ...
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Higgs Mechanism and Wave-Particle Duality

According to Higgs Mechanism a particle acquires mass when it couples to the higgs field. Now consider Wave-Particle Duality. Suppose I am doing a Young's Double Slit Experiment using electrons. When ...
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4answers
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Why does the wavelength of a particle go down with higher velocity?

In mechanical waves, the wavelength increases with a higher velocity. λ = v / f. And the wavelength in particles lower with a higher velocity. λ = h / mv.
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1answer
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Cases of Double slit experiment [duplicate]

I'm a high schooler, and I want to clarify what I know about the double-slit experiment. I broke down the double slit experiment into 4 categories: particle w/one & two slit, and wave w/one & ...
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1answer
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Quantization and wave-particle dualism of light

I'm studying atomic spectras and got puzzled about light-quantization. I'll expose my effort to understand it so far. Blackbody radiation Around the year $1900$ Planck explained blackbody radiation ...
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3answers
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How wave become particle?

Picture below is from a video of Wiki, when there is a observer, the wave will reduce to particle. In my view, observation is equal to interact of two particle. Now, before the interaction, two ...
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2answers
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Probability on the same wavefront [closed]

My question is as follows. Is the probability of finding the particle on the same wavefront of its de Broglie wave the same?
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1answer
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Is electron/photon wave or particle in Feynman sum over histories formulation?

In the famous double slit experiment, a photon ( say) can behave as wave or particle depending on whether there is ( or how) an outside observer measuring the experiment. Copenhagen interpretation ...