Talk:Double-slit experiment

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Info on the detectors used[edit]

This article says nothing about the mechanism of action of the detectors used to verify the particles passing through a slit and influencing the resulting condition.

How does that detector work? There is an action reaction that takes place through the process of detection that is obvious but not explained. (talk) 07:19, 4 August 2018 (UTC)

David Deutsch[edit]

David Deutsch says in his book The Fabric of Reality that the Double-slit experiment is a proof for those who argue that Multiverse is real.

The article says nothing regarding the Many-worlds interpretation. May I inquiry why not?

Kartasto (talk) 14:51, 14 July 2014 (UTC)

Please give a page number and a quote to back this up. --Ancheta Wis   (talk | contribs) 15:56, 14 July 2014 (UTC)
The Fabric of the reality, whole chapter 2. Here:[1] is more I suppose...

Kartasto (talk) 16:05, 14 July 2014 (UTC)

The one-line writeup for MWI is making it look fringe, and giving Copenhagen first place and starting its writeup with the word "consensus" is making it look favored. (talk) 10:44, 13 April 2015 (UTC)

I feel we should also show what his logic is, TIME FOR RESEARCH! If I don't come back, find me a wife I tell her I love her, then finish my research. Nector deorum et virorum 00:43, 10 March 2017 (UTC)


As someone who studied the Double-slit experiment as an undergrad who now works with the invisible sort of electromagnetic radiation a daily basis as an Engineer, I'm now very seriously questioning the results of this experiment. It seems the detector equipment was simply operating near its signal-to-noise ratio detection limit, and thus sometimes detecting a "photon" on one side and not the other. In this explanation the wave is present in both slits and not registering with the detection equipment on both sides at the same time due to lack of signal strength. Can someone please provide a reference that would put my mind at ease? — Preceding unsigned comment added by Einslaten (talkcontribs) 21:16, 3 December 2015 (UTC)

At very low intensity, firing one photon at a time, detectors at both slits never both fire. It's always one or the other. Or, take the slits away -- any time you have particles and detectors, only one detector ever fires per particle; that's uncontroversial in quantum mechanics. Does that help? Perhaps you can be more specific about what claim in the article you're questioning. -Jordgette [talk] 21:35, 3 December 2015 (UTC)
If you believe you are able to fire a single photon as sensed by your detectors, then you should be able to setup an experiment such that detectors are setup at varying distances from the source of the single photon. The amplitude of electromagnetic radiation decreases according to the inverse square law, so you should be able to show that more than one "photon" arrives at detectors closer to the signal source, and prove the "photon" theory is false. Einslaten (talk) 22:19, 3 December 2015 (UTC)
The double slit experiment is extremely well studied and the statements in this article are fairly well sourced. Which specific statements in the article do you question, Einslaten? BTW, it helps readers if you sign your posts by typing ~~~~ after them. --ChetvornoTALK 22:07, 3 December 2015 (UTC)
I question the circular link between the signal source and signal detector, and would like to see a reference to an article that proves a single photon can be emitted by a signal source. Einslaten (talk) 22:19, 3 December 2015 (UTC)
Emission of photons is of course a random process, but basically all you have to do is turn down the intensity of your light source until it is emitting on average one photon a second, or one photon a minute, or whatever rate you want, at which rate only one photon is present in the experimental apparatus at a time. As you mentioned it's not all that easy an experiment because noise due to black body radiation has to be carefully excluded. Here are some sources confirming that the single-photon double slit experiment has been done: [2], [3], [4], [5], [6] I'll add them to the article since that section may not be well-enough sourced. --ChetvornoTALK 22:56, 3 December 2015 (UTC)
None of these references address the explanation that the detection is simply a result of momentarily exceeding the signal-to-noise ratio requirement of the receiver. All electromagnetic wave receivers exhibit a signal to noise ratio requirement. Go buy one and look at the specs, but I guess it's asking to much to look at the Engineering details. (talk) 00:15, 6 December 2015 (UTC)
Yes, it really is. This Talk page is for discussion of the article, not for discussion of the experiment. The article seems to be based on WP:reliable sources which represent the present understanding of the physics profession, traceable to articles in peer-reviewed journals. If you feel we are using bogus sources, or misrepresenting what the sources say, that would be something to discuss here. If you disagree with the sources themselves, that would be something to take up with the authors. --ChetvornoTALK 00:48, 6 December 2015 (UTC)

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Broken link fixed[edit]

While reading this article, I noticed a broken link. Some earlier edit re-arranged what had been a section into a subsection of a different section. Looking in the MOS, it suggested using the Anchor template to link directly to a subsection. So this was how I fixed the broken link (anchor name in the article was called “Which way” as this was the first part of the subsection name). I have verified the link from the article’s main body now works as expected. As this is the first time I have seen such a problem, is this an acceptable method of fixing it? Is there a better way of achieving the same effect? Prime Lemur (talk) 12:32, 8 July 2018 (UTC)

Title Formatting[edit]

Is file 'File:Double slit experiment.webm' over-riding the title of this page? — Preceding unsigned comment added by SkyME5 (talkcontribs) 12:43, 6 February 2019 (UTC)