Experiments Definition and 478 Threads

Hi, I'm new to the forum... I just modified some ticker timers to serve as standing wave generators for my class. It got me wondering when ticker timers were first used to do physics motion experiments. I'm assuming it was from the time they had telegraphy, so maybe as early as the later 19th...

As I understand it, there is a certain probability associated with detecting spin states. Which if the spin state is unknown prior to testing is 0.5. But if I prepare an electron with say spin up, then measure it again for spin up I will detected spin up 100% of the time. Also, if I prepare...

I feel as though my ability to properly write up lab books when I do/after I do experiments is really weak. I struggle to analyse the data in a meaningful way. I don't know how to/when to calculate errors properly. I'm near useless when it comes to logarithmic graphs, or inferring any important...

The below is very amateurish, so please correct/modify where needed. Just curious to know the technicalities i.e. how experiments, involving entanglement, are conducted - from a technical perspective For example - Let's take the Bell's tests Entangled pairs would/could be created via SPCD...

Hi! Does anyone know the most fundamental experiments that CERN did involving the discover of anything related to quarks? What is the most recent and important discover of CERN about quarks (heavy quarks)? Thank you.

I'm currently studying ion trap experiments, many papers suggest the cooling of trapped ions, and other papers say its a heating process. I know there's a difference as to what each refers but am unclear of the difference. I'll quote...

Is it not good for someone learning about any kind of science to also learn about older disproven ideas or theories in order to understand why something does not work? Not in an effort to pursue them but to learn about the mistakes or problems they revealed.

Are electron also wave as are photons. I can image electron as Gaussian pulse to preserve it dual particle-wave nature. Does it preserve own magnetic and electric field values and wave frequency?

I know there are many recourses online. But I'd like your individual input/advice What are some good chemical experiments I can do at home? Thanks

Hello! I am currently starting my thesis, and I would be pleased if you could help me. As it is an ficticious force for non inertial frame, the Euler force affects every movement measured from the surface of the Earth. But, it is related to the angular acceleration changes of our planet, so...

The news threads and press releases I have read of the work of Halfmann and his colleagues at the IAP, Darmstadt, report that they were able to bring "light" to a "standstill" within a material for about a minute. I haven't had the chance to read the groups published papers on the subject yet...

I am referring to this article:http://www.quantamagazine.org/20140624-fluid-tests-hint-at-concrete-quantum-reality/ Only a handful of phycisists (John Bell being one of them) took the Bohm-interpretation of QM seriously, given it had no scientific falsification, Are those views likely to change...

Homework Statement The following kinetic data were obtained for an enzyme in the absence of any inhibitor (1), and in the presence of two different inhibitors (2) and (3) at 5mM concentration. Assume [ET] is the same in each experiment[/B] (1)...

As you can see in the below image, they use computers for some of their experiments. What will students do with it?! (Who are `they`? Find them here.)img: http://physics.nyu.edu/~physlab/GenPhysII_PhysIII/Scope&EKG.jpg img2: http://physics.nyu.edu/~physlab/Classical and Quantum Wave...

Do you guys know of any physics experiment that I can do in my house? Please reply soon thanks.

I want to do a survey about the parameterization of PDFs & FFs, and make a summary (say, in tables and figure) about the experiments and groups working on it, and their results. Where can I found these materials? Regards!

I need experiments for each the following topics in order to explain how they work as part of an assessment for VCE year 12 physics. Magnetic Force Magnetic Field lines DC Motors Transformers Electromagnets Your help would be greatly appreciated!

What are your opinions about these two experiments described at: http://adsind.wordpress.com? Can they be used to reject some of the aether theories?

Hi, I find it sad that textbooks state JJ.Thomsons, Rutherfords, Milikan, Borhs etc. discoveries as facts without actually showing the whole experiment and showing in detail how they performed the experiment and how they derived their equations. Are there any textbooks that actually do this? I...

(1) Exact form of U exists because of the results of experiments in adiabatic work, what are such experiments which gives proof for above statement? (2) Is differential of Internal energy dU path dependent?

I have a question on the tension between special relativity and quantum mechanics, so please correct the category if this question is in the wrong location. I was looking at the write-up of an experiment: “Causality, relativity and quantum correlation experiments with moving reference frames”...

Any help would be greatly appreciated I tried using the search bar but nothing came up.

Hello to all. I have a pretty general question. Hopefully it will require a somewhat technical answer. My question is this. Has there been any experiment where quarks have been smashed together? Perhaps at the lHC or Fermi. The other day I was told about such an experiment where two quarks were...

Homework Statement Let q = kd sin(θ), so the sin(θ)-dependent factors in the M-slit and the 2-slit formulas for registered diffraction intensity can be compactly written: 1/M2 = (sin2(Mq/2))/(sin2(q/2)) and cos2(q/2), where the 1/M2 prefactor normalizes them in common to have unit maximum...

Do we presume the light beams to be parallel even though they meet at one place? like the image here http://hyperphysics.phy-astr.gsu.edu/hbase/phyopt/sinslit.html

First I want to admit that I'm not a physicist, but I'm very interested in physics. I have some questions about quantum mechanism that I haven't been able to find the answer through prolonged internet search, and I registered this site just to get answers to these questions. One of my...

I'm trying to just find the bare bones of the actual experiments done in quantum mechanics without any interpretations of what the results are. For instance, in the double slit experiment I'm told that observation is what causes the wave function to collapse. How many different ways and...

Suppose that you know the results of all mayor quantum experiments, such as two-slit experimet, violation of Bell inequalities, delayed choice quantum eraser, etc. But suppose also that you do NOT know anything about quantum theory, such as superposition principle, Schrodinger equation, Hilbert...

I have red only about a few experiments conducted to detect the speed of light using interference pattern. but i need to know whether there have been any experiment conducted by MOVING LIGHT SPEED DETECTOR (INTERFERENCE DEVICE) & keeping the source of light and mirrors in rest? If there...

I've just started learning about special and general relativity and came up with a couple of questions that look like paradoxes to me. I just need a break from reading, thought I'd discuss this with someone to see the application of what I've read so far. Here are my examples: 1. Say you...

Spontaneous collapse theories like GRW postulate that elementary particles have a 10 to the -16 probability per second for spontaneously collapsing in the position basis, where the collapse function involves multiplication by a Gaussian. Entanglement then guarantees that macroscopic objects are...

Can be thought or actual experiments in which discreteness or continuity of space is thought to be concluded from the results. I know there is a recent experiment in which people in LQG tried to observe dispersion of gamma rays over large spatial scales, and I am also aware of a proposed idea...

Homework Statement I have a project for my Materials Science and Engineering class and we have were given 4 unknown materials and we have to determine which kind of materials they are. We have to come up with our own experiments. As of now, I've done the Rockwell hardness test, electrical...

Me and my friend are looking to do a project for our science research class in high school. My friend said he is allowed to use his Rasperry Pi for a project and I am interested in physics while he is a big computer and technology guy, I'm looking for ideas for projects either using the software...

Sabine Hossenfelder recently wrote a blog post containing this parenthetical remark: "(I had meant to write a summary of which possible experiments for quantum gravity pheno are presently being discussed and how plausible I think they are to deliver results, but I got distracted by Dyson’s above...

I am not an expert in physics. I just wanted to know. Quantum outcome is said to be uncertain. Could this be the reason, i.e every time we run a quantum experiment, the background(or say sub-atomic area) must be different with passage of time. As we do not have complete knowledge of the...

For the iodine test, How does boiling alcohol speed up the diffusion of chlorophyll out of the cells? Why does the leaf become crisp and breaks easily after it has been dehydrated by alcohol? For the detection of oxygen produced from photosynthesis, Why does sodium hydrogencarbonate...

I've been trying to follow these experiments that NASA is doing to try and warp space-time on a microscopic scale. Obviously that won't have us traveling at FTL speeds yet, but it would be proof of concept. From what I read, they are using a laser, and some kind of special ceramic material (I...

I read an article I found on the internet the other day about some Chinese scientists who have set a new speed record for Quantum Entanglement or (Spooky action at a distance). I have since been fascinated by Quantum Mechanics and am trying to understand it (as best I can). I am not a scientist...

Hello, I am having trouble with significant figuress in experiments! Thanks for any help you provide! I have an experiment where I pick the mass, and I chose 200g. So if I want to convert this to mks units i would do the following: 200g x (1kg/1000g) = 0.2kg Is this calculation...

Hello all, I need to design an experimental apparatus that involves manipulating the path of a laser. Thus far I only know the bare basics about optics and I have never attempted optical apparatus design, does anyone know a book that is a really good reference for experimental applications of...

Hi everyone! I have to do an experiment in the lab related with interference in sound waves with same frecuency. I am just looking for ideas or suggestions. Thanks!.

Hi, Has anyone in recent times reproduced the experiments of Kristian Birkeland, WRT to his Saturn effect using his terrella? If so what were the conditions? Adam

Anyone interested in going over some crude experiments and having a look to see if anything stands out as incorrect or impracticle? I'm not interested in any discussion as to the validity of doing the experiments, kindly keep that nonsense to yourself, I'm only interested in any input to...

I have been following Dr. Michio Kaku and his ideas on string theory. My question is, with the addition of other dimensions, what types of experiments and/or results could possibly provide evidence that this theory is correct. If we currently can't perceive these "discrete" dimensions, what...

What would happen if: 1- Two neutrons approach each other slowly. Do they glue? 2- A rainfall of neutrons fell to the Earth. I mean very slowly (very low energy) and a huge amount, the same mass as the oceans, i.e. Thank you very much!.

What sort of experiments can be doen with Graphite ?? I need experiments that can be done for the research of graphite.. GOt any ideas??

Hi, I'm new on this forum and don't really know how to use it, but I really need help I need to figure our 2 different experiment methods to answer these questions: -if an object is launched vertically, what was the initial velocity? -if an object is launched horizontally, what was the...

1. Similarities and differences between magnetic and electrostatic experiments can include: 2. What are there factors individually and then decifer 3. Similar- both have positive 'and/or' negative charges. Differences- electrostatic must involve an imbalance of positive or...

Hiya, So I want to do some experiments with concrete curing under a magnetic field. The samples would need to be approximately a 2" diameter tube maybe 8" long. I'm not that aware of how a magnetic field would behave any more, been awhile since I did any physics outside of classical...