New answers tagged experimental-physics
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Why is sequential Stern-Gerlach experiment a complete surprise?
It's like with magic tricks: If you know the mechanism you are no longer surprised. However, if somebody first shows you a red ball and then after some supposedly irrelevant manipulations shows you ...
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After a particle hits a screen and becomes stuck to it, will we know both position and momentum?
The other answers are right - +1 to both. Perhaps this example will clarify it.
A very dim monochromatic plane wave passes through a slit 20 um wide and strikes a fluorescent screen behind it. We see ...
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After a particle hits a screen and becomes stuck to it, will we know both position and momentum?
You can make a detector that reports position and momentum to any precision you like. On the other hand, if you prepare multiple particles identically, your detector will report a distribution of ...
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Accepted
After a particle hits a screen and becomes stuck to it, will we know both position and momentum?
Or perhaps I have a misunderstanding of how detector screens work?
This is the answer.
You are trying to beat the QM by using a magical screen, which detects both position and momentum with infinite ...
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What earthbound experiments show gravitation is general to all matter, and not just towards the earth?
There is some equivalence-principle literature based on free-falling retroreflectors (no air resistance) in underground boreholes, from sounding towers aboveground, and in vertical shafts in dams. The ...
rob♦
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What earthbound experiments show gravitation is general to all matter, and not just towards the earth?
Every so often we get questions from flat-Earthers, people with religious convictions, or people with personal theories. Often they do not listen to other answers. It sounds like you have found such a ...
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Cloud Chamber Failure
I'm a little bit late in my answer.
I'm building a cloud chamber myself. There are several details you have to pay attention to. First there is the temperature gradient between the upper part and the ...
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The physics behind a homemade particle accelerator
confus[ed by] the fact that I am only making a model and it turns out
which is very different from a real one.
Yes, there are some similarities between the model and the real thing, but also huge ...
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The physics behind a homemade particle accelerator
A cyclotron is a type of particle accelerator which repeatedly propels a beam of charged particles (protons) in a circular path. Cyclotron uses electromagnetic fields to propel charged particles to ...
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The physics behind a homemade particle accelerator
Yes, in this video the centripetal acceleration is provided by the tube. This is kind of overcomplicated language for "the tube is the only reason the ball follows a circular path." The ...
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How to check laser beam polarization
What you want to do is measure the Stokes Parameters.
The Stokes vector is defined by $\vec{S}= \left(\begin{array}{c}S_{0} \\ S_{1} \\ S_{2} \\ S_{3}\end{array}\right)$
Where $S_0$ represents the ...
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Efficiency of particle accelerators
The overall "efficiency" of SLAC was very, very small. Fortunately, its scientific objectives did not require it to be efficient. It met its objectives, while throwing away a lot of energy. ...
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Accepted
What is the control group in neutrino detection?
Short answer - one can detect what direction neutrinos come from. Neutrino detectors don't just count neutrino collisions.
Neutrinos either hit something in the detector or they themselves are ...
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Accepted
Using Peltier module for heat diffusion experiement
If the foil is thin, air will efficiently remove heat from the foil, while heat will only diffuse into the foil slowly. The cross sectional area for cooling is the area of the foil, while the cross ...
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Deep inelastic scattering remains
The electron bullets used to strike the proton carry more than enough energy to blast the proton to pieces i.e., the electron's energy exceeds the binding energy of the nucleon. Those pieces then ...
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Why is the RMS value taken to calculate uncertainty in random errors
The purpose of taking any sort of average is to come up with a number that represents the whole data set--one that is, in some sense, close to most of the points. A natural way to calculate how well a ...
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Current through a solenoid: magnetic field gives a staircase graph
You should get a linear or smooth exponential change in field strength. Possible explanations would require a careful look at any features of the test setup such as frictional hysteresis; power source ...
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Accepted
Wiki video shows that vacuum fluctuations exist, despite that vacuum fluctuations do not exist
You would be forgiven for thinking that the linked wiki article/video was somehow "an image of the real quantum vacuum and virtual particles" instead of the computer output of some physical ...
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Understanding the Magneto-optical trap
I don't know whether is the spin of nucleus or of the electrons
Both. The hyperfine levels used in MOTs comes from the combination of nuclear, electron angular momentum and spin.
What does it mean ...
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Accepted
What do WMAP CMB Temperature map values represent exactly?
Your main link contains the sentence
A detailed description of how these files are formatted is available here.
The linked page says
As previously stated, the first FITS extension contains the maps....
rob♦
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Why did the air not heat up in this experiment demonstrating the atmospheric greenhouse effect?
Reply to: Why did the air not heat up in this experiment demonstrating the atmospheric greenhouse effect?
We got notice about some discussion on this website concerning our paper “Experimental ...
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Experimental evidence of linearity of states
Not exactly a full answer, but some thoughts (I really want an answer to this question too...)
This paper https://arxiv.org/pdf/2302.13421.pdf makes the distinction between "kinematical linearity&...
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