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1 vote

Diffraction grating from reflection

Without more information on your experimental setup and the exact type of grating used, it is difficult to know exactly why. However, based on the pictures, it is fairly certain that the reflected ...
Vincent Thacker's user avatar
0 votes

Diffraction grating from reflection

It is not quite clear exactly what the experimental conditions of the experiment was. For that, the incident angles of all the different experiments would need to be specified. One can then also ...
flippiefanus's user avatar
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0 votes

Diffraction grating from reflection

What I think is happening here, that in A the diffraction is not of the type of diffraction that the experiment is about. The pattern that you are seeing is more like that of a dispersive diffraction, ...
Soham Mitra's user avatar
3 votes

What is the physical reasoning behind the mathematical derivation of double-slit interference pattern and single-slit diffraction pattern?

About "(...) the minima equation for double slit and single slit are opposite of each other, despite both are built on a similar concept." no one has answered yet. The answer to this ...
Radek D's user avatar
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1 vote

What is three-photon interference?

Single-photon interference is demonstrated by the famous double-slit experiment. Two-photon interference is demonstrated by the Hanbury Brown and Twiss (HBT) effect and the Hong–Ou–Mandel (HOM) effect....
Yuan John Jiang's user avatar
1 vote

Difference between thin film interference and Bragg diffraction of electron

Promoted from a comment: Because the index of refraction at x-ray wavelengths for most materials is awfully close to 1.0, while the index of refraction in the visible can easily be 1.5 and above (1....
0 votes

Applying Fermat's principle in Fraunhofer's diffraction

If measured from the source you take the constant phase surfaces of the propagating wave, these are the wavefronts, then Fermat's principle holds between any to points that lie on the same orthogonal ...
hyportnex's user avatar
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0 votes

Does QM recognise empty waves?

It is the EM field that you are interested in here ... not just any field. The EM field propagates many virtual fields even before the photon is created. Virtual fields are your "empty waves&...
PhysicsDave's user avatar
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0 votes

Does QM recognise empty waves?

In QM the wave function is the fundamental physical property describing your system. In your case, before you disturb the system by the measurement, it will be an extended object reaching threw the ...
Zaph's user avatar
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1 vote
Accepted

Does QM recognise empty waves?

In the MWI what is happening in reality is described by quantum equations of motion. In the pilot wave theory reality is described by the same equations of motion with point particles sprinkled on top....
alanf's user avatar
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0 votes

Does QM recognise empty waves?

I'm glad you called the photon a particle and that's the main thing you need to remember. There is no wave unless your talking about millions of individual coherent photons radiating from a common ...
Bill Alsept's user avatar
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2 votes
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Many-Worlds Interpretation: What Ensures Every Physically Possible Scenario is Actualized in Some Parallel Universe?

In the Many-Worlds Interpretation of the Mach-Zehnder Interferometer experiment, one interprets the universe as splitting into two, with photons traveling in different directions in each universe. ...
Nullius in Verba's user avatar
3 votes

Many-Worlds Interpretation: What Ensures Every Physically Possible Scenario is Actualized in Some Parallel Universe?

Saying the universe splits in two is a high level description of a messier process. Any measurable property of a quantum system is represented by an operator called an observable that describes how ...
alanf's user avatar
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3 votes
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What is the upper limit of size for diffracting an object?

As far as I know the largest object that has been successfully diffracted is a oligoporphyrin molecule with a molecular weight of about $25000$. This was done on 2019 and is reported in Quantum ...
John Rennie's user avatar
1 vote

What is the upper limit of size for diffracting an object?

Electrons are a relatively light particle, and therefore have a relatively long De Broglie wavelength. Electrons have been diffracted through the spaces between atoms in a crystal. A proton is about $...
mmesser314's user avatar
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2 votes

Treatment of infinite reflections in thin-film interference

One such rigorous treatment of the multiple reflections is the transfer matrix method, well described on its wikipedia page, or in this article by Steven J. Byrnes regarding a python implementation. ...
Gucio's user avatar
  • 71
3 votes

Treatment of infinite reflections in thin-film interference

Thin film interference is typically used to create anti-reflection coatings. In this situation (unless the angles allow total internal reflection), there are not multiple reflections. The number of ...
Stevan V. Saban's user avatar
8 votes

Treatment of infinite reflections in thin-film interference

As has been pointed out by @JohnRennie the Fabry–Pérot interferometer is a device which relies on significant multiple reflections between two parallel surface. However you will note that the ...
Farcher's user avatar
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12 votes

Treatment of infinite reflections in thin-film interference

You are quite correct that in general we need to consider multiple reflections. For example a Fabry-Pérot etalon relies upon multiple reflections to function properly. However in simple treatments of ...
John Rennie's user avatar

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