Experiment Definition and 1000 Threads

Homework Statement Suppose, the following equation describes the relation between an independent and a dependent variable physical quantities(that will be measured by experiments; for example, temperature, current, voltage etc) x & y : ##y = ax^2 + bx + c## We have to find the values of the...

Standard quantum mechanics text-books discusses Born rule, which states that the probability of finding a particle in a certain region in space is given by $$ |\Psi ({\bf r},t)|^2d^3r $$ Thing is, I never have seen a discussion about how you can actually measure the particle position in a...

I'm familiar with the delayed choice experiment, and I'm trying to suss out this new setup. http://www.sciencealert.com/reality-doesn-t-exist-until-we-measure-it-quantum-experiment-confirms Reading this article is not very beneficial if there's a confounding typo. Paragraph 10: Should that...

Hi guys i don't know much about physics but I am interested in learning about it i have According to wikipedia virtual particle hasnt never been observed but i think that they are wrong it has been observed in this experiment...

I'm just a layman with an interest in science, so my terminology won't be accurate. Sorry. Set up for question: the wave-front splits as it passes through the slits and must (I guess?) condense to a point upon impact with the recording device (paper/film etc). The question: if a photon is...

Not sure where to post this but is anyone else intrigued by sonoluminescence? I'm designing an experiment so if anyone wants me to harvest data for them I can integrate another measurement into the design. Let's start doing some research on this site!

Hi Folks, I am not sure I can appreciate the quantum weirdness that supposedly exist because I do not fully understand the experimental set-up of the double slit experiment. I watched the following which left me with some unanswered questions I have some questions about the experimental...

enangle 2 electrons. Capture 1 electron by using this method http://news.discovery.com/tech/photo-first-lights-captured-as-both-particle-and-wave-150302.htm. Send an electron from Earth to the moon. Have an detector on the moon that measure a property of entanglement and same with on earth...

In chemistry book I read that faraday observed that when two metal plates called electrodes, are placed in an electrolytic solution and an electric current is passed, the solution breaks up into charged particles called ions" but I am confusing that if it was a electrolytic solution then it...

The experiment I am thinking of is simple: - A typical (ideal) photon polarization quantum entanglement setup with Alice and Bob. - Alice and Bob detectors are constant at 90 deg. angle difference (such as they allways get perfect corelation with different result) Plus: - Between Alice and...

For the past year or so, I've been experimenting with Isobutane. I used to get it in relatively cheap canisters of r600a from amazon.com and AliExpress, and that worked fine. Now, however, AliExpress has NO purchase options for r600a, and amazon.com will not ship it to the US, even though they...

Homework Statement Say if I had a system with 3 springs on the left, 1 spring in the middle, and another 3 springs on the right. I add masses to the central spring and calculate the extension. After all my measurements, I plot a graph of spring against mass. If I then repeat the experiment...

Hi, I was trying to think of a way to generate a Poisson distribution using a single deck of 52. Say I am looking at the position of the Ace of spades in the deck after a number of shuffle rounds (1 shuffle round is 7 riffle type shuffles). Success is that an Ace of spades is on top of the...

Homework Statement It is known that the theoretical resistivity of copper is approximately: 2*10^-8 Ωm. But after I conducted an experiment to find the resistivity of copper, the results turned out to be: 1.68*10^-8Ωm. This is a very small error that can be easily dismissed due to "human...

As you know, this year, 2015, is the year of light: http://en.wikipedia.org/wiki/International_Year_of_Light I want to create a video clip limited to 90 seconds to show in our university's TED-like show to make students excited about light. Do you have any idea? any experiment?

I'm not a physicist, but I have a layman understanding of some aspects of Quantum Mechanics. I just watched a video explaining the experiment, where you put two differently polarized sheets behind each slit, but then erase the polarization with third polarizing sheet that's located between the...

Homework Statement a) Imagine that you are conducting an activity with a laser to create an interference pattern. Use the appropriate equations to predict two ways (other than the way described in the following example) to change the interference pattern in order to have closer fringes. Explain...

Dear Sirs, I have a question regarding the interpretation of the Michelson-Morley experiment. As I understand it, the special relativity theory implies that, say, if I were to watch another person in a n inertial reference frame (say a vehicle) moving relative to me send a light beam towards...

If I wanted to design an experiment which would allow to distinguish muons from pions in the energy range from 200 MeV to 2 GeV, how would I do it in a simple way? Could I just use the Time of Flight experiment? What quantitative arguments can one make for the design of the detectors?

1. So, during one of my classes, the teacher showed us a small experiment, and asked us to explain how it works. The experimented consisted of a tube, closed on both ends, and attached to said tube is what I think is a magnet. Now, everytime he rotated the tube, the magnet rised to the top with...

I have performed an experiment testing how mechanical energy is conserved. I conducted this experiment by first creating a ramp. I gathered data by first calculating the gravitational potential energy of a marble on various points on the ramp (depending on height). Next I rolled the ball down...

Hello everyone, I was re-studying some issues that I wanted to repeat in magnetism and the moment I saw the stern gerlach experiment again, I came up with a question: what would happen if we kept this experiment exactly the same, but this time we used electric field only, instead of magnetic...

A few question about the double slit experiment... I have watched many videos and discussions about this experiment and am curious if anyone has ever varied the slits... What happens if one slit is vertical and one horizontal? If they are closer together or further apart? One fat and one...

Hi, a fast question while I was reading the results of the Wu experiment: http://iktp.tu-dresden.de/uploads/media/Experimental_test_of_parity_in_beta_decay_-_Wu.pdf It says that "the observed gamma-ray anisotropy was used as a measure of polarization and effectively temperature" However, I don't...

Homework Statement In the Cavendish experiment, the two small balls have mass m each and are connected by a light rigid rod with length L. The two large balls have mass M each and are separated by the same distance L. The torsion constant of the torsion wire is κ. b) Put the large balls a small...

Question: If there were only a single elementary particle in the entire universe - could it move, and if so, how would its movement be measured?

Hello! I've been reading up about Quantum Mechanics, and I'm trying to understand various aspects of the double slit experiment. This is one of among many videos I've watched: Dr Quantum - Double Slit Experiment Here's my understanding so far of the basic setup (where the gun is shooting out...

hey! Whats the difference between the intencity graph of diffracted blue laser light and diffracted red laser light? Thanks

For my undergraduate physics lab, we are asked to spend 3 weeks (3 3-hour sessions + any time during the week if I need extra time) doing an experiment of our own choosing. The physics department will provide any experimental tools needed within reason. I have been considering using this...

Homework Statement A high school experiment shows a plant immersed in a solution of nitrate ions. The beaker is closed but has an air vent passing into the solution. Q. Why is air bubbled into the solution Q. Why is the beaker covered with black paper Homework EquationsThe Attempt at a...

Homework Statement In a KhanAcademy video, light of wavelength 700nm shines through a double-slit whose holes are spaced 1300nm apart. If a screen is placed 3m away from the double-slit, what will be the distance from the central bright spot on the screen to the next bright spot...

Homework Statement The diagram above shows a single slit with lines marking the direction to a point P in the diffraction pattern. Two wavelets at x and y pass through the edges of the slit as shown. The possible value for path difference, py-px, that places P at the second nodal line next to...

Homework Statement Investigating the effect of mass on the period of oscillation. This experiment is about SHM of a floating cylinder, and the theory is explained in this website: http://physics.stackexchange.com/questions/64154/shm-of-floating-objects Also, I'm attaching a diagram of my...

I've gone ahead and uploaded the paper I had filled out during class. For this experiment, students must be able to find the acceleration of a cart using kinematics, dynamics, and energy. A cart with a mass on it (mc=2.48kg) is connected to a mass-less string which is connected to a pulley...

"An interaction is required to manifest physical reality because it creates distinctions." my friend referring to the double-slit experiment, is it true? He said that the physical world, in order to exist, we need to interact (with our senses) lol

Hi, I want to varify something that I intuitively know (I think), that might not seem intuitive. If an electrical current is circulating and then it's path splits in two, where there is a circulating current. The larger current (black) will have to pass through this loop; what I want to varify...

According to JJ Thomson's atomic model, Rutherford expected deflections of alpha particles through small angles. I'm unable to understand why he had expected "small angles". Can someone please explain.

Hi! I would like to create an electric field inside a cylinder. Is there any EXPERIMENTAL way to impose 120V DC (or any higher or lower) voltage on the surface of a cylinder and generate electric field inside it? I'm specifically looking for "experimental" approaches. Thank you very much :)

Homework Statement Let's say I have a Langmuir probe I-V characteristic from the Helimak experiment. The plasma ions are singly ionized argon. The probe has an effective area of 0.000016 m^2. Estimate the floating potential, electron density, and temperature. Based only on the nature of the...

Hi, I read the quite common introduction to the Bragg's Law, but there are some points I have not clear at all; I hope you can help me. 1) The book says that, for the diffraction to be evident, the wave length of the incident wave must be comparable with the order of magnitude of the...

Homework Statement A quasi-monochromatic beam of light illuminates Young's double-slit setup, generating a fringe pattern having 5.6-mm separation between consecutive dark bands. The distance between the place containing the apertures and the plane of observation is 7 m, and the two slits are...

Hi all, just I made my own Chladni Plate or CymaScope and have played a little bit with it: I was curious and I made some tests with guitar: but my question is: does enyone know why this is happening?

Hey everyone, I was just wondering how the detectors on the slits operate. The ones which supposedly observe the particle without altering it's trajectory too greatly. I have no idea how this would work with a photon. I'm assuming it's easier with an electron or something.

Homework Statement How close does the alpha particle gets to the nucleus in gold foil scatering experiment?Homework Equations Ek = 2.0 MeV W=F delta x F=(kq1q2)/r^2 W=(kq1q2)/r E=W=(kq1q2)/r The Attempt at a Solution E= (k(79)(2) e^2)/r 2.0MeV= (k(158)e^2)/r 2,000,000 eV = 8.99 Wm^2 c^-2 ((158)...

I'm know I'm just an enthusiastic newbie here, but something's been nagging me and I would appreciate if I could get some assistance on the matter. I got a notion about light and the double slit experiment, the notion came to me as I was contemplating light traveling at its native speed. For...

A coin can stay upright on its rim for a some time when rolled with a some velocity, while it falls from its upright position at the slightest disturbance when stationary. I did not understand why it happened. I just dropped a few coins on the floor and noticed this thing which is very new to me.

Can @Drakkith , @Doc Al and others help me in this? In YDSE, if s is the size of source slit and S is the distance between source slit and the double slits, Then why condition s/S <= λ/d must be satisfied to observe fringes? Here λ is wavelength of light source and d is the distance between two...

What is the effect on the interference fringes in Young's Double slit experiment when the source slit is moved closer to the double slit plane? I have seen you people @DrChinese , @Cthugha , @bhobba helping in these kind of topic before. Can you help here? It would be great if others also can help.

Homework Statement An accelerator experiment collides a beam of electrons head-on with a beam of positrons. The particles in each beam have energy Ee as measured in the lab frame. Suppose one electron-positron pair collide to form a photon and neutral pion particle: e- = e+ ---> γ + π0...

If we increase the mass of the particle beeing fired at the slots, at what point will the standard experiment break down and become just small pellets beeing fired and classical physics will apply? Theoretically say we increase one Planck unit at A time. Or, just is there A limit to the...