# Tag Info

4

The photons are not detected at the slits. They are detected at the screen. This has been done with single photons, as seen in this video. Generally if a detector is put in one slit, the interference disappears. Here is the build up of single electron interference Successively longer integration times as electron arrivals (white dots) are ...

1

In interference and diffraction, light energy is redistributed. If it reduces in one region, producing a dark fringe, it increases in another region, producing a bright fringe. There is no gain or loss of energy, which is consistent with the principle of conservation of energy. If you consider a point where there is destructive interference, there is a dark ...

2

There's no way that you can add a vector pointing along the $x$ axis, and have it cancel a vector pointing in the $y$ direction. So the amplitude of the light is zero nowhere, and there are no intensity fringes. Instead, the polarization of the wave changes at the screen. As you study the light along the direction that you expect to see fringes, you would ...

0

Double slit interference pattern looks as shown below: When you see the same patter at different angle you will see it as shown below: Believing that your text book is correct in saying that fringe separation as the distance between the centers of adjacent bright or dark fringes (in double slit experiment) from the center of the screen, my textbook ...

0

http://www.ipod.org.uk/reality/reality_quantum_intro.asp Could this possibly be what you are referring to? In this article the author discusses calculating the speed of a particle in the double slit experiment.

0

The so called Copenage Interpretation avoids the question about whether the electron is a particle or a wave. This question is directly not allowed. In fact the wave function is an instrument of the theory with not physical meaning. Acording to CI, the goal of the theory is only to make predictions about the results of an specific experiment. In the case ...

3

The wave-particle duality thing becomes important when you are dealing in a microscopic scale where quantum mechanics becomes relevant and you have to discard your ordinary notion of particle and wave. So don't expect to relate "particle" or/and "wave" notion that you usually get from picturing a marble or water wave from classical world surrounding you. ...

-4

mass=energy(actually mass is a form of energy) so everything who has energy(wave) has mass also if you squeeze all wave in a very little place you get a solid item(like you). if you squeeze a solid(like you again) in a very little place you will get a black hole

1

Electron is accompained by waves, so there still exists electron which has mass. This solves your problem I hope. Look here at what de Broglie says in his Nobel lecture of 1929 (this is an extracted portion): I thus arrived at the following overall concept which guided my studies: for both matter and radiations, light in particular, it is ...

34

I don't really like the whole wave-particle duality business because it obscures the more startling truth about particles: they aren't sometimes waves and sometimes particles, and they also don't transform into waves sometimes before reforming as particles, they are something completely different. It's like the story of the blind men and the elephant: a ...

9

The waves of quantum mechanics are probability waves. The solutions of quantum mechanical equations are the wave functions and the square of the wave function gives the probability of finding the particle at $(x,y,z,t)$. That is why the solutions for the electrons in the field of a nucleus are not orbits, but orbitals, i.e. probability distributions. The ...

7

It seems that you have misundrstood the wave-particle duality. What happens in the double slit experiment is that the electrons impact at the screen as they were particles. But they also interfere, just as waves. So you can see a wave-particle behaviour. But it doesn't say that the electron is destroyed, becomes a wave and then a particle again (as you ...

0

the light from the two different paths are in phase going to cam1 and out of phase going to cam2. To see this lets look at each path going to cam1 and each path going to cam 2. The important thing to know is that both "half-silvered mirrors" are in fact interfaces between optical media of two different indices of refraction. The interface goes from bottom ...

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This half-silver based setup is known as Mach–Zehnder interferometer. you can see this behaviour when sending one photon in to this interferometer. The photon travels both upper and lower paths. The lower path assigns minus sign (phase shifting by 180 degree) to the photon so it is canceled out and reaching always CAM 1/A. I tried at home with normal laser ...

3

Shouldn't the waves be like sine waves. That depends on what you want to show. In this particular case, what is shown is the propagation of a particular ray of light. Why is the slit part the starting of a new wave. A slit acts as a source of spherical waves. This is the Huygens-Fresnel principle. This is done to produce a new single source of ...

2

Yes, the waves are and should be (approximately) sine waves. A proper animation would show the intensity at each point, so it would need a continuum of colors. For the sake of simplicity, the Wikipedia animation only shows the places where the sine wave approaches the maximum in orange. Each slit is the source of the waves according to the Huygens-Fresnel ...

0

In different interpretations of quantum mechanics the definition of "measurement" is different. But I think it would be enough if I give just five of which you can choose yourself. In Copenhagen/von Neuman interpretations the collapse of the wave function is triggered by the observer. This person has the special property which no other object in universe ...

0

Don't really know after reading these (and other) explanations for the collapse of the wave function, however, it seems possible, to me, that we would know nothing whatsoever, would never even become aware of anything, or even exist for that matter, without the constant collapse of the wave function, consciousness being only one many ways, possibly infinite ...

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