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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1answer
101 views

How do (and don’t) particles emerge from fields?

I am aware of the following field- and particle-like notions: QFT particle, a unit of excitation in (the Fock space of) a QFT; SR field, an extremal $A = A(\mathbf x)$ of a Lorentz-invariant action; ...
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1answer
29 views

How does sunlight undergo interference as shown in the video?

As far as I know, for interference to happen in a double-slit experiment, the light source should be coherent and monochromatic. If that is the case then how come sunlight undergo interference and ...
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2answers
35 views

Evaluating double-slit experiment for wave-particle duality

Is it possible that the wave-like behavior of particles in double slit experiments is just an outcome of particle distribution? Can we regard or treat a normal or Gaussian distribution as wave-like? ...
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1answer
57 views

Mathematical proof of Bohr's complementarity principle

Complementarity principle, in physics, tenet that a complete knowledge of phenomena on atomic dimensions requires a description of both wave and particle properties. Depending on the experimental ...
-1
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1answer
27 views

why laser beams don't get reflected (or knocked away) when they intersect with each other?

laser beams are photons with the same frequency and the same direction, but according to the wave-particle duality, photons have mass. but if we shoot two masses and they intersect at some point ...
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2answers
57 views

Single slit diffraction - wave vs particle view

If monochromatic light is shot through a single slit onto a screen, we can analyze the pattern on the screen using wave properties. This analysis is done assuming the wavelength is constant. But with ...
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2answers
48 views

Observer in the double slit experiment with photons

In the double slit experiment with photons, the interacting observer is an instrument, detector… If you replace the detector with a piece of metal with the same mass as the mass of the detector, the ...
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0answers
43 views

Why call it a particle and not a wave pulse?

My physics textbook says that photoelectric emission provides conclusive evidence for the particle theory of light. Apparently, since photoelectric emission only works at certain frequencies, we can ...
3
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3answers
97 views

Can particles at rest have wave nature?

Can particles have wave nature even when they are at rest? I think this is possible due to the formation of standing waves
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3answers
93 views

How does wave-particle duality describe Photoelectric effect?

I don't know if electrons work as particles or waves or maybe both in photoelectric effect. How is Photoelectric Effect actually described by Wave-Particle Duality?
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1answer
51 views

Could particle wave duality be caused by gravity? [closed]

We know that light (and other particles) displays particle wave duality, or the ability to be a particle and a wave at the same time. After that it becomes confusing. We also know that gravity is a ...
7
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1answer
337 views

What was Newton's own explanation of Newton's rings?

What was Newton's own explanation of Newton's rings? Newton advocated a corpuscular theory of light, but his rings would most conveniently be explained by a wave theory. How did he explain his own ...
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2answers
58 views

What would diffraction of a macroscopic object look like?

I read an interesting question here in the forum (Will a football (soccer) diffract?) and came up with the following doubt: even though its diffraction angle is too small to be detected, if we had the ...
0
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2answers
56 views

Why do electrons/photons create an interference pattern in the double slit experiment? [duplicate]

So...if electrons and photons are both particles and they pass the two slits, why do they create an interference pattern as if they were waves? Now from what I've read, it's because of the ...
1
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1answer
73 views

Is double slit interference due to EM/de Broglie waves? And how does this relate to quantum mechanical waves?

I'm really confused about the fact that there seems to be two types of waves at play: the EM wave, which I understand to be an actual fluctuation of EM fields in space, and this other type of bulk ...
1
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2answers
61 views

Question on matter waves

So,I just started this topic on modern physics in school that contained the concept of"de broglie waves" or "matter waves" and there are a few concepts that are unclear to me. Firstly, does a single ...
0
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1answer
75 views

What does the 'charge' of the electron transform into when the electron gets converted to wave? [closed]

Mathematically when a particle exhibits wave nature, its mass is supposed to be converted into energy. I want to know what happens to the charge of particle? what does the 'charge' of a non ...
0
votes
1answer
24 views

What happens to light when an optical cavity path length doubles instantaneously?

Let's say we have light contained in a cavity (of initial length $L$) and then instantaneously remove the second mirror, thus removing the barrier between the first and a third mirror which is some ...
0
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1answer
43 views

Light waves and water waves

I have an idea and i would like to have more information: If I drop a stone in the water some rings or waves will appear. Those rings are made of water and are behaving that particular way because of ...
18
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6answers
5k views

Is it wrong to say that an electron can be a wave?

In QM it is sometimes said that electrons are not waves but they behave like waves or that waves are a property of electrons. Perhaps it is better to speak of a wave function representing a particular ...
1
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1answer
38 views

Understanding wave functions of matter waves

The wave functions of matter waves give the probability density of the particle being at a certain location. Does this arise because as an outside observer, we have incomplete information about the ...
1
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1answer
49 views

Why does compton scattering provide evidence for the particle nature of light?

I understand that compton scattering is modeled as a collision between a photon and an electron, but why does this conclusively prove that light can act as a particle? Why couldn't the same ...
0
votes
1answer
35 views

Number of photoelectrons vs Frequency

This is the graph plotted between photocurrent (proportional to number of photoelectrons) and potential applied with different frequencies. As it can be seen, the number of photoelectrons released ...
6
votes
3answers
249 views

Does wave-particle duality exist for gravitational waves?

For electromagnetic waves there exists a wave/particle duality: light sometimes behaves as a wave, and other times as a particle (photons). Does such a duality exist for gravitational waves? In other ...
2
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0answers
56 views

Now that gravitational waves have been discovered, what does their particle version look like? [duplicate]

Duality dictates that gravitational waves should have a particle counterpart too, right? Will this in any way help solve the big problem of quantum gravity?
3
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0answers
12 views

Why is this result wrong for finding speed of a neutron in relation to deBroglie wavelength [duplicate]

So given a deBroglie wavelength 1.8nm and the equations E=hf and E=1/2mv^2 you can get v = 2h/m*(1.8*10^-9) but this is 2 times the expected value. Wherever I look online people use the momentum p ...
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1answer
110 views

How can a probability distribution have wavelength (de Broglie wavelength)?

The wave function described by Schrodinger's equation is interpreted as describing the probability of a particle in at any point in space, i.e. a probability distribution. Since this distribution ...
2
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1answer
38 views

Is the relation c=νλ valid only for Electromagnetic waves?

What is the validity of the relation $c = \nu\lambda$? More specifically, is this equation valid only for Electromagnetic waves? I read this statement in a book, which says: de Broglie waves are ...
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1answer
87 views

Photon doesn't answer it… How will wave nature explain it?

There are two perfect reflect mirrors facing opposite to each other... I place a lamp which is not lit in between the mirrors... I switch it on and switch it off and remove the lamp from between the ...
0
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1answer
142 views

How to calculate a straight edge diffraction pattern

A straight edge diffraction pattern is not the same as a slit or multiple slit diffraction pattern. The spacing between fringes is not equal but gradually gets smaller the farther out you go as in the ...
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0answers
27 views

Why isn't the de Brogile equation not λ=2(h/p) [duplicate]

So I was thinking about the two equations: $E = \frac{1}{2}mv^2$ And $E = hf$ Then $\frac{1}{2} * mv^2 = hf$ $\frac{1}{2} * pv = hf$ $\frac{\frac{1}{2} * pv}{h}$$ = f$ $\frac{pv}{2h}$$ = f$ ...
1
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1answer
35 views

Is it possible to detect a continue pattern of a single wave? [closed]

In the two-slits experiment , one photon gives an interference of two waves with their maximums. Is it possible to seperate one of the waves ? If so, can you see a continue pattern on the print ...
0
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2answers
50 views

Double slit with observer?

https://www.youtube.com/watch?v=Xmq_FJd1oUQ Apologize if this is a dumb question, I'm just a kid trying to make sense of something that I'm new to. It shows the wave interference when you send a ...
0
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1answer
84 views

Question about heisenberg uncertainty principle and single-slit diffraction

My question relates to this video illustrating the Heisenberg uncertainty principle. The video shows light being shot through a slit forming a spot on a screen. As the slit narrows, the width of the ...
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3answers
60 views

Homework - Young's Double Slit Experiment

I have attached the question as a picture. I simply don't understand where to begin this question. It is given that $l \gg d$. Why shouldn't the phase difference at $O$ be zero? What exactly is ...
1
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1answer
42 views

How does the interaction between individual electrons of beams affects the diffraction pattern?

Consider the diffraction of an electron beam. How does the interaction between individual electrons of beams affects the diffraction pattern? If it really affects the diffraction pattern, then is ...
1
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1answer
89 views

What is an Unbalanced Interferometer

I have read in some papers about a so-called unbalanced interferometer. This appears particularly in the context of Experimentally verifying the Englert-Greenberger-Yasin Duality Relation. However, I ...
2
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3answers
97 views

Energy in one wavelength

I know that the energy of one photon equals $E=hf$ and that concept of photons came from the photoelectric effect. My question here can we assume that a photon equals one wavelength for example if we ...
0
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1answer
67 views

Are electrons wave packets instead of particles?

After studying de Broglie's hypothesis we can very well say that every particle is just a localised wave packet and not a particle in the sense of the word. A particle would be like a point in space ...
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0answers
24 views

Doubt regarding de Broglie relation from group velocity

This is a derivation of de Broglie relation from my textbook. I'm confused regarding the following: In the equation $p=\hbar k + c$ the author sets $c=0 $ by stating $ p=0 $ so $k=0$. I don't ...
2
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1answer
103 views

What is the physical nature of electromagnetic waves?

I've been trying to work out what the physical nature of electromagnetic waves is, since I reasoned that given electromagnetic waves have wavelengths that are given in distance units, rather than ...
0
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1answer
54 views

What part of this picture demonstrates the wavelike properties of light and what parts demonstrate the particle-like properties?

Back in march some scientists took the first picture of light as both a wave and particle. I was wondering what parts of the image actually demonstrated these properties. I have some ideas, but the ...
2
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1answer
69 views

Visualizing the (expected) gradual change from quantum to classical behavior

I'm pretty much a layman (no formal Physics education beyond high school) but find Quantum Mechanics endlessly fascinating. Ok, so when the double slit experiment is performed using ...
0
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2answers
91 views

At which times does light act as a wave and at which times does it act as a particle? [duplicate]

Is light a "particle", that exists as a photon or as a "wave", the usual electromagnetic wave. If it's both when does it exist as a "particle" or a "wave"????
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2answers
75 views

Light wave particle duality

I have studied about the dual nature of light and all the experiments that proved light was a wave and sometimes a particle, and I am comfortable with the concept that it can be both. However, I have ...
4
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3answers
129 views

What is the oscillating quantity in matter waves? [duplicate]

Every wave is characterised by some periodically changing disturbance. For example, that entity is air pressure for sound waves and electric,magnetic fields for EM waves. What is that disturbance for ...
0
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1answer
40 views

Wave like behaviour

Sorry if this is a repeat but I'm curious if wavelength=h/p then does that imply that we would be able to observe the wavelike properties of a very still object? For example an average human weighing ...
0
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2answers
82 views

Light interference single particle 4 slits experiment - what are interpretations apart from many-worlds interpretation?

Someone knowledgeable about physics advised me to read a book "David Deutsch: The Fabric of Reality, 1997". The book gives experiment like two-slit one, difference is that 2-slits compared to 4-slits ...
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0answers
39 views

EM wave frequency and photon energy

We know that a quanta of light of frequency f has energy hf. But when I consider a single photon there is no concept of "frequency of a wave" because there is no EM wave associated with it which ...
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0answers
10 views

Illustrate two phenomena which reveal wave nature of matter [closed]

i think the experiment by Davisson and Germer showed the diffraction pattern by electron i want to know specifically what were the two phenomena