Experiments Definition and 460 Threads

In the aftermath of the recent Steinberg paper where they reconstruct average photon trajectories in the double-slit experiment, it has been pointed out several times that the reconstructed average trajectories strongly resemble the single-photon trajectories predicted by Bohmina mechanics...

The Chicago Blues Fest is going on this weekend in Grant Park right in the heart of downtown Chicago. If you are attending this, or are in downtown Chicago this afternoon, a short walk from the Blues Fest up Columbus drive just north of the Chicago River, you can attend this...

Hiii, If there's a simple pipe and pump circuit and the pump and water properties remain the same but we increase or decrease gravity, what happens? I know that in a closed pipe conduit with fluid flowing around, nothing would change because I think in Bernoulli's equation, as height is the...

Recently, I have a look of the Einstein's thought experiments challenging the uncertainty principle. One of the experiments is the Einstein's slit. I found the description about it : "Consider a particle passing through a slit of width d. The slit introduces an uncertainty in momentum of...

Hi all, these questions have nagged me for years and I have never found a text or a paper that even addresses them. Regarding photon "radius", what is the maximum width that two slits can be spaced which still permits the double-slit phenomenon to occur? Would this be a valid method of...

I have to come up with an experiment using cardboard boomerangs that the rest of the class will do. The class then has to make calculations and test out the boomerangs to see if their calculations were correct. However, i don't know what kind of experiment I can have the class do with...

How can high energy physicists determine the spin of a particle that decays before even reaching the silicon detectors? For example if a new particle turned out to have spin 3/2, how would it be distinguished from a spin 1, spin 1/2, or spin 0 particle?

I am doing experiment about escaping powder. In this experiment I am immersing hot wire into the water and investigating the motion of floating particles. What is the importance of thickness of wire? And what do you think about other parameters?

My interests are in astrophysics, so please forgive my ignorance of particle physics. I've just read Frank Close's book, "Neutrino"---excellent read, I'd recommend it---in which he points out that Ray Davis' first experiments to detect neutrinos from nuclear reactors (with no detections)...

Hi Can anyone direct me to a recent review article of tests of Bell's inequalities. As recent as possible Thank you

I'm trying to look at specific methods and results in how mendel did his experiment. The number of plants in the P generations, F1 generations etc that show the exact ratio between them. I'm finding it kind of hard to do so though. Can anyone help?

Hi I did an experiment on dominos and came up with a set up. The set up: I placed 20 dominos one after another with a space of 3 cm in between each along a meter scale. The domino box had mobile top which placed right next to the dominos such that when upward force is applied it would hit...

F=μmg. How was μ calculated? Obviously experiments were needed. So, done the experiments, what's the exact conclusionology that μ is that much for that type of ground and that much for the other type of ground?

Cell Biology -- Devising Experiments Homework Statement I've included a picture of the problem to avoid confusion 2. The attempt at a solution I need to devise an experiment that would confirm the 3 statements. By experiements, it means something along the line of DNAase II sensitivity...

Hello everyone, I am thinking of a nice experiment that can be done in high school laboratory. It is not obligatory for them to include calculations, they just have to be easily conducted without expensive equipment and relatively safe. The main purpose is to make students learn through...

Hi guys, I'm looking for a book that will detail all the great science experiments (such as double slit, oil drop experiment, thompson's cathode ray) in a nice, detailed, chronological fashion, that can also be understood by non-science experts. Anyone got a good resource?

Hi, As part of my final year project I have to heat air within an exclosed environment (i.e. a 1m x 1m x 1m insulated box) to test the effectiveness of using phase change materials to regulate ambient air temperature. To do this I need to slowly heat the air inside the box at a rate that...

There are a lot of experiments to disproof hidden variable theories with Bell's inequalities (local) and Leggett's inequalities (non-local). But de broglie-Bohm theory (dBB) survives from all of them. Also I know there is an Quantum Equilibrium Hypothesis says that everything that disproof dBB...

Hi, I'm currently producing an undergraduate poster on CP violation and I have a few questions: - Was K0 -> \pi++\pi- the decay which proved CP violation in the 1964 Fitch/Cronin experiment, or was it oscillations between K0 and \overline{K}0, or both? (Answered) - How were the decays in...

Has anyone performed experiments regarding macroscopic quantum coherence (superposition of and macroscopic object)? What about testing if macroscopic objects obey macrorealism, or whether QM prevails? Links to articles or experiments would be apprecited.

hi, see my diagram here, is my "neutron gun" correct, or have i made mistakes? what will happen to the "uranium powder"? will it eternally grow more radioactive, or will it at one point transmutate? http://alf.000space.com/neutron%20gun.png thanks for your help, alf.

Hi, This is my first post here. I have done some reading on quantum mechanics and am curious to know more. I know about the double slit experiment and the interference pattern produced. I have also read of entangled pairs. My main question is: If you have a pair of entangled...

Me and a couple friends are trying to resurrect the old physics club at my university and could use some cool inexpensive experiment ideas to try and boost attendance and have some fun. Any ideas?

Suppose I am simple man, who studies in home and read some scientific journals . Could I be able to deliver some theories(and would it be possibly correct ?. Would I have to be engaged in big laboratories consiting super computers, advance telescopes etc? How was eeinstein became able to...

Have there been any proposals of plausible experiments for any of the heavily studied Quantum Gravity models?

Hello all, I have questions regarding my understanding of NMR and the mathematics of it. If anyone would take the time to read this, I would very much appreciate it. Please bear with me, I am a beginner. Thank you! First, there is the question on how to model this phenomenon. Up till now I...

Hi physics peoples, [for the tl;dr peeps: is there any point plotting a force distribution when I already have a pressure distribution, aren't they essentially the same thing?] I've been doing wind tunnel experiments on structures for my final year engineering project, my supervisor (who I...

What would you say are the top 5 "hallmark"/landmark experiments in physics?

Hi guys, just wanted to ask a question related to muon experiments (and all other which can be presented this way) to get some things clearer. Ok, here goes: We have lots of muons traveling towards Earth. Their mean lifetime, measured in lab conditions (at rest) is 2.2µs. Their...

Hi, I have some questions about time travel. My understanding is that it is an accepted theoretical consequence of General Relativity. If the scenarios I'm describing are too ridiculous then perhaps analagous microscopic scenarios would be more palatable. Consider these scenarios: Scenario...

Homework Statement For my essay on nuclear fission and fusion, I have to discuss some experimental evidence for nuclear fusion. I also need to find info about scientist that are responsible for developing the theory behind nuclear fusion. I am having trouble find info on these aspect. Any...

For example, a esemble of 50% spin up and 50% spin down electrons, the other of 25% spin up,25% spin down, 25% x direction spin up and 25% x direction spin down. The density matrix is identity matrix for both(correct me if I'm wrong), is there any way to distinguish the two experimentally?

We have windtunels to measure air flow, Erlenmeier flasks for chemical reactions, and so on. Why not just load the geometry of the aircraft into a computer simulation and get the results from there. It is much more cost efficient and you can manipulate things faster and easier. For chemical...

I've been reading some papers about electron double slit experiments, including the one by Jonsson which seems to be the most detailed and well written so far, but I've only been able to find about five papers total. Jonsson was one, then a 1989 single-electron double slit experiment, and a few...

Here are two exercises: 1. ) The proton radius is 0.8fm. What energy electron beam do you need for this resolution, if the target is liquid H2? 2.) A pion radius is 0,65fm. What energy pion beam do you need for this resolution by scattering on the electrons of a stationary target(pi-e...

Recently, the MINOS detector has shown results that call into question the symmetrical properties of anti-neutrinos with respect to neutrinos: http://arstechnica.com/science/news/2010/06/antineutrino-masses-throw-physics-a-curve.ars More strange results came from MiniBooNE...

Homework Statement In an early set of experiments, Milikan observed that the following measure charges, among others, appeared at different times on a single oil drop. What value of elementary charge can be deduced from these data? 1) 6.563 x 10^-19 C 2) 8.204 x 10^-19 C 3) 11.50 x...

Hello, Does anyone know of any quantum physics experiments that can be preformed at home. All of the experiments I've read about seem to require expensive equipment and precise alignment. Any information would be appreciated. Thanks.

1. A clock is placed on a light beam. Will the clock stop? If yes, why doesn't the beam stop altogether? 2. A ruler is placed on a light beam. Will it's length shrink to zero? Why/Why not? 3. A massless particle is placed on the beam. What would happen? 4. An electron...

I'm wondering, now that the universe has expanded and is now pretty much flat, can any experiment we do tell us what might have happened during the Big Bang, when the universe was still small and tightly curved? It doesn't sound like the same situation. The results we get today travel meters or...

Note: This isn't intended to be a Global Warming thread but rather a Greenhouse Gases thread (they're not the same thing), so please let's not talk about Global Warming because I don't want it closed. I'm very interested on any feedback or thoughts anyone may have for my experiments...

We recently did experiments in school using sources of Radium-226, Americium-241 and Strontium-90. They all had a strength of around 185 kBq. In some of the containers there was only a very thin piece of foil keeping the material inside, or so I was told. Since the experiments I've kind of been...

hi maybe I'm asking a stupid question, I'm a layman, and i didn't succeed to google out the answer. while performing single photon double slit experiment, why the photons don't just get absorbed in the separation between the slits, like they do in the screen behind. and consequently...

I am about to do an investigation on the 'factors affecting inductance.' It would be brilliant if anyone had any ideas on experiments I could perform to investigate the factors affecting inductance. Thanks for your time.

Are there experiments which you can claim that they are the evidence of the time-energy uncertainty relation? Or can you write which experiments can be directly related to this uncertainty relation? i.e A beta decay or a strange effect in (quantum) optics... everything you have in mind...

For my AH Physics investigation I'm going to research the refractive index of a liquid and need a few different experiment ideas to perform within my pretty basic school lab. An example of a feasible experiment would be much appreciated! I have thought about changing the...

http://www.uslhc.us/The_US_and_the_LHC/Collaborating_Institutions/Institutions_by_Project#alice" A comprehensive list of all US Universities participating in the LHC Project, institutions marked with a blue arrow (47 total) have contributed to design/installation of hardware and software to...

Prodution and storage of antimatter seems to be a hard task. The latter is of course because antimatter is annihilated when it makes contact with regular matter. Still, wouldn't it be possible to create \overline{^3He}^- ions and store these in a metal container which has a lot of negative...

Hi I hope I'm posting this in the right section. I am trying to find some experiments that would be appropriate for an introductory biophysics course for some second year students. Any links/pointers in the right direction would be great, although I'm specifically looking for enzyme/molecular...

Part of my independant investigation requires me to carry out an experiment, which when I graph results, would confirm Malus' Law. I plan on using a bulb as my ambient source and two polarizing lenses. I will then measure the intensity of the light after polarization. Hopefully, if i graph...