Interference Definition and 999 Threads

Homework Statement The problems are attached in the photo below (or at least I'm hoping they are, doing this from my Ipad makes this somewhat diffcult) Homework Equations Not really an equation, but the Principle of Superposition states that the amplitude of two interfering waves are added...

Homework Statement A car honks a 2kHz tone and is 40m from a long high wall. A man is running parallel to the wall, 10m away from it, at 5 m/s, and is presently 30m away from where the whistle is closest to the wall. How many beats/second will be heard by the runner as he will hear the direct...

The optical two-source interference effect due to Hull (1949) has largely been overlooked by the history of quantum mechanics. Mandel and Fleegor brushed up the effect by reducing the signal strength of the sources and reducing exposure times for interference collection. In the end this effect...

Hello and thank you! I am having trouble understanding Mr. Thomas Young's equations for the double-slit apparatus with the bands etc. Specifically, for constructive interference: Length = PS1-PS2 = n(lamda) What I understand is that this n value is the phase shift in their wavelength...

I'm really confused about the way the light can suffer interference. I'll try to explain the way I think all this occurs and the question I have if this explanation was correct. I would like you guys to correct me if anything I say is wrong and to try to explain me the final question. Light is...

I've studied Young's slits and other diffraction type experiments and so understand how a light wave can interact and constructively or destructively interfere depending on path difference etc. My question is: why is this not more obviuos is everyday life? Say I'm looking at a cup placed on a...

Homework Statement What happens to the kinetic energy of the system when two pulses interfere destructively? Exact Question: Two pulses in a stretched string whose center are initially 8 cm apart are moving towards each other as shown in the figure(Attached). The speed of each pulse is 2...

Homework Statement Glass, despite being transparent, still reflects a little bit of light. When making lenses and such, you'd rather not waste any light with stray reflections. Fortunately, you can use destructive interference to suppress those reflections. The picture below shows a piece of...

Homework Statement Assume that the waves from the sources are emitted in phase, and that at the point P, amplitude of the disturbance is zero. what is the wavelength of the traveling wave emitted by the sources? (there is more than one possible answer here,but provide the largest possible...

Homework Statement Problem number 3 is the one I have the issue with. I attached it as a PDF file. Homework Equations Looking through my textbook, the equations that I think are relevant are: P=Eδ/2b[((c^2-b^2)(b^2-a^2)/(2b^2(c^2-a^2))] I am assuming the hub and the pipe are the...

single electron diffraction through single slit Hi Guys Wondered if you could help me. Say a high energy electron (low wavelength?) is fired through an arrangement of atoms (single slit). How does a single electron hit a detector / screen according to a diffraction pattern? I understand...

Homework Statement Suppose a third slit of the same width were added halfway between the original two slits. (the original two slits were a distance d apart). When there were just 2 slits, the point C was the center (a principal max), point Z was the first maximum after C, point Y was the...

Homework Statement White light is sent downward onto a horizontal thin film that is sandwiched between two materials. The indexes of refraction are 1.80 for the top material, 1.68 for the thin film, and 1.50 for the bottom material. The film thickness is 5.24*10^-7 m. (a) Of the visible...

This is about "double slit" setup only without slits and instead there are two electron beams. I found some experiments doing something like this, but the setup was always rather complex, with some mirrors and such. So the question is why can't we get interference pattern by simply crossing two...

In my textbook, when two waves of the form: y_1 = A\cos \left( 2\pi f_1t \right) y_2 = A\cos \left( 2\pi f_2t \right) combine, the following trig identity is used: \cos a + \cos b = 2\cos \left( \dfrac{a-b}{2} \right) \cos \left( \dfrac{a+b}{2} \right) which yields an expression for y...

Hi there, I want to modify a equation which is written for Singal to Noise Ratio. Now I want to change for logical interference. But I could not find any reliable source of explanation, " what is the relation between SNR/SINR and interference(Logical/Physical)?"

I have to do a presentation on why cellphones are banned in hospitals, and I'm going to have to explain how electromagnetic interference from the waves a cellphone gives off can mess with medical equipment. Can someone please explain the physics behind this?

Homework Statement Can wave-like behaviour, eg interference or diffraction, be observed with the following? Electrons with a velocity of 20 m/s passing through a double slit with a separation of 2nmHomework Equations The Attempt at a Solution The solution is given in the book. λ = 2.65 x...

Do you think that: Single particle interference is explainable via entanglement? For example: in the single particle double slit experiment

Homework Statement Transparent wax of refractive index n=1.3 is deposited on top of a glass plate of width 1cm and refractive index n=1.5. The thickness of the wax is 0.01mm at one end of the plate and tapers uniformly to zero at the other end of the plate, which is defined to be at x=0. At...

Homework Statement Two identical loud speakers placed at A and B 2m apart produce sound waves of frequency 440 HZ and with a velocity 320 m/sec a small microphone was used and placed at C along a perpendicular line from AB if there will be a destructive interference at C find the length of...

The usual interpretation of the double slit experiment, when done with a single photon at a time, is that the photon must interfere with itself. However interference cannot be measured in a single-photon experiment - it requires a large number of photons to manifest a discernible interference...

Homework Statement Two loudspeakers, at the same height are 2m apart and in phase with each other.Both emit 705Hz sound waves into a room. A listener stands 5m in front of the loudspeakers and 2m to one side of the centre. a) Is the interference pattern at this point...

In short the question I am trying to answer is: 1. do the "waves-functions" from separate particle interfere? 2. do the Schrodinger equations predict the interference pattern caused by the interference of the "wave functions" of two separate particles? The above question is...

Hi guys, i know that if we were to have one water wave passing through two slit, an interference pattern would be form. However, i am still unclear of the kind of the pattern that will be form when a single water wave were to pass through a single slit. Will it form an interference pattern too...

Homework Statement Two coherent in-phase point sources of sound are located at the points (-2 m, 0 m) and (2 m, 0 m). If the wavelength of the sound is 0.9 m, at which of the following x values on the x-axis does destructive interference occur? Homework Equations Wave Equation: y(x...

Hi. I have aluminium tube (Alloy 6063T6 ) 1 1/2 inch outside diameter 1/4wt. I need to turn inside of this tube to take a 30mm outside diameter suspension bush interference fit . Is there a standard calculation for the diameter of 'receiving' holes for interference fit bushes?

Hi all, I have a question here that I've done but it hasn't got an answer provided. I'm sure it's easy stuff but haven't looked at this material in a while so just want to double check. (The things in red are what I added to the original diagram) RE-DONE d = √17 d + λ/2 = 2√5...

When two wave functions are in perfect phase = constructive interference when the phase difference is half (the wavelength) = destructive interference What happens when the phase difference is more than one wavelength in case of: Case 1: single particle interference Case 2: two-photon...

Hello all I really hope someone can shed some light on a problem I'm having. I'm currently researching granular fluid behavior in High voltage electric fields. My setup is essentially a 200kV generator placed directly under a glass container with my test medium inside of it. The...

Hello learned Engineers, Physicists, and people more useful than myself: Thank you in advance for reading. I would like to submit a more educated proposal to a utility company for a method that would allow it to install 500 kilovolt renewable power transmission lines through many residential...

I'm trying to increase my understanding of what happens to waves with interference so I'll ask the following question to try and do so. If one had a pool of water with a wave machine pulling the side in and out all along one side and an identical wave machine on the other side working in...

If you have radiation from two black body sources at same temperature will they make a maximin minimum Interference pattern that another small black body sphere can be inserted in, in a minimum space. Will they radiate low radiation to the sphere (Due to the radiation energy in that area been...

Hello. I need some sort of explanation. I was unsuccessfully trying to find information on the web and derivation by hand seems rather complicated for me. So I have a such set-up: HeNe laser ->> plano-concave lense )], light is incident by some angle (NON 0°). then looking to reflection...

Why, in the Young's double slit light interference experiment, the medium fringe is the brightest and the other ones go reducing its bright as you moves away the center, if they all suffer the same constructive interference. Please explain this to me, I have this doubt it's been a month and...

Homework Statement A pair of speakers connected to the same signal generator face each other, one at x=0 and the other at x=1.5m. If they are producing a sound frequency of 2000Hz what are the points (position x) of constructive interference between the speakers? Express your answer in...

Homework Statement Consider two sources of sound, each of which emits a sound wave of the SAME frequency and the SAME intensity. The sources are located on a straight and level road, relatively close to each other. You, the listener, are also located on this road, about 1/4 mile away from the...

Hello everyone. I am a mechanical engineer but I have a question which I hope someone can provide me some info. I was interested to know whether it is possible to block signals by creating a magnetic field or not. I'm asking this question because some people live in places which have a lot...

I haven't been able to find any literature that answers this question in a pleasing way. Also, all sources on the internet are contradictory. If electromagnetic waves (out of phase since they are emitted by the gaseous atoms in discharge tube) sent through a diffraction gitter interfered with...

OK, a quick intro to the delayed choice quantum eraser is at wikipedia (http://en.wikipedia.org/wiki/Delayed...quantum_eraser ). I have attached a figure of the modified DCQE. In this setup there is no delay, there is no choice, and there is recombination of the idlers instead. In the...

If two radiation signals cancel each other out through destructive interference, is it still possible for a material to absorb energy and heat up when exposed to the two radiation signals?

Hi guys, Was trying out a home made double slit experiment as I've seen on youtube with a laser pointer and 2 pieces of pencil lead. Then I realized that I can obtain the same interference pattern with the single pencil lead. Is this equivalent to a double slit interference?

So my brother had a birthday party the other day where this company that rents laser tag guns comes over and all his friends played a big game of laser tag outside. the guns worked surprisingly well, and there was even a "grenade" that would shoot lasers out in all directions once a pin was...

In the two well referenced experiments [1, 2] that claimed to have observed double slit interference pattern of SINGLE electron, the central claim is that there could not have been more than ONE electron present at the same time in the apparatus (or such probability is negligible). However...

If I were to construct a cathode ray tube in which the beam of electrons was focused on a double slit, behind which was a screen of phosphorous, could I create an interference pattern? Could this setup be made at home? I imagine making the slits would be the most difficult part. Or is this...

Homework Statement A laser with wavelength d/8 is shining light on a double slit with slit separation 0.300 . This results in an interference pattern on a screen a distance L away from the slits. We wish to shine a second laser, with a different wavelength, through the same slits. What is the...

When you shine light through a diffraction grating/double slit/single slit, I understand that you see an interference/diffraction pattern on the wall, so that you have: light source -- grating/slit ---pattern on wall But if you put a grating/slits between your eyes and a light source, why do...

Hi There is lots of text, but it is actually just a presentation of facts and thoughts to explain where I am in all this. There are two main questions: 1) Are the incident waves from a very distant source, say a star very far away, interfering with one another to create one or more resulting...

I am an artist with some knowledge of physics and I am trying to build a pinhole camera to expose photographic film using sunlight that passes through a filter, pinholes and Young's slits. I would like to photograph an interference pattern using the sun as the subject. My prototype camera...

Homework Statement A lens with radius of curvature R sits on a flat glass plate and is illuminated from above by light with wavelength λ (see picture below). Circular interference patterns, Newton's Rings, are seen when viewed from above. They are associated with variable thickness d of the...