Standing waves Definition and 249 Threads

Homework Statement The description of the potential distribution is given in the attached image. The particle arrives from the left with E>V0. write the solutions to the S.E in regions x<o and x between o and a Homework Equations I believe psi(x)= e^ikx+Re^-ikx in x<0 and...

Homework Statement In the equation describing the superposition of the two waves to obtain a standing wave, which term represents the wave propagating to the left? Homework Equations Y(x,t) = Asin2\pi(t/T - x/\lambda) + Asin2\pi(t/T +x/\lambda) The Attempt at a Solution I think its...

hi,im a newbie over here,my physics quite poor so i really need help by understanding it,i jz wanted to ask could any1 please explain to me what is in phase,&out of phase?;im totally baffled.:blushingAnd what's frequencies of the normal mode in standing waves in a string fixed in both ends?i...

Homework Statement I've got my exam in solid state physics tomorrow, and although I've understood most of the most complex subjects now, I feel I'm missing the understanding on one fundamental phenomena; Bragg reflection.. Throughout Kittel it's mentioned, that when we're at the first...

Homework Statement Hey guys, I have a homework problem in my electromagnetism class that's got me a little stumped. I'm supposed to measure the interior dimensions of my microwave oven and use that to calculate the 5 lowest frequencies at which I can sustain a mode in which I have standing...

Homework Statement A stretched string fixed at both ends is 2.0 meters long. What are three wavelengths that will produce waves on this string. Name at least one wavelength that would NOT produce a standing wave pattern.Homework Equations The Attempt at a Solution Since standing waves have...

Two speakers are driven in phase by a common oscillator at 800 Hz and face each other at a distance of 1.25 m. Locate the points along a line joining the two speakers where relative minima of sound pressure amplitude would be expected (Use v = 343 m/s). This problem ended up screwing my mind...

Hi all,can anyone tell me the meaning of lines that i had read from a book: "The electron is situated within a distance of 10 to the power -8 to 10 to the power -10 m. from the nucleus and is always confined only within this distace. The matter waves associated with electron is defined in terms...

Hi all,actually i want to discuss about standing wave. Its little bit confusing to me.As a simple defintion,when two waves of equal amplitude travel in opposite direction then what the resultant wave,for which there is no propagation of energy is called standing waves. But another...

Homework Statement I just want to check the solution of the following problem: We have got a string whose length is l and fundamental frequency is f. This string is clamped at a point 0.25l. What are possible frequencies of oscillations of this clamped string? The Attempt at a Solution...

IN an atom why the matter waves associated with electron is regarded as standing wave having varying amplitude within a region and zero outside the region

[SOLVED] Help regarding standing waves a.The flute player is very musical and produces a pure tone of frequency f=600Hz. For the flute to be in 1st harmonic, what is d where d is the length of the flute? b.By How much has d to be increased to increase the number of nodes by 2? (And keep the...

[SOLVED] standing waves Homework Statement A standing wave is a superposition of two harmonic waves described by y1= Asin(kx+wt) and y2= A sin(kx-wt), where A=3.31594 cm, k=10.0531 m-1, and w=18.2212 s-1. Determine the smallest positive value...

Homework Statement "Design a tube closed on one end so that it's lowest frequency standing wave is 440Hz. (i.e. determine the length of the tube." Homework Equations Um...I was unsure. I thought maybe...I might use w=2(pi)f...and the function 2A sin (kx) cos (wt), but I epically failed...

Why is it that in a room, if you're close to any of the walls the lower frequencies of a sound become louder? Ofcourse, there's an interference pattern in the room. You can hear this by walking around and you'll notice that at some points the bass is weaker and at some points it's stronger (the...

Homework Statement I'm trying to decode a graph of Tension vs. \lambda^2 of standing waves on a string to understand the actual meaning of the slope. I also need to derive the equation for the line from two expressions: v= \sqrt{T/\mu} v= f\lambda Homework Equations...

I would appreciate if some learned folk could answer these questions to increase my understanding. 1. Does GR support standing wave solutions to the equations? 2. Do physicists study these standing wave solutions? 3. Is it correct to describe GR equations as wave equations? (e.g. as...

Homework Statement A narrow column of air is found to have standing waves at frequencies of 390 Hz, 520 Hz, and 650 Hz and at no frequencies in between these. The behavior of the tube at frequencies less than 390 Hz or greater than 650 Hz is not known. How long is the tube? Homework...

Homework Statement A 50-cm-long wire with a mass of 1.0 g and a tension of 440 N passes across the open end of an open-closed tube of air. The wire, which is fixed at both ends, is bowed at the center so as to vibrate at its fundamental frequency and generate a sound wave. Then the tube...

Homework Statement The figures below show systems of standing waves set up in strings, fixed at both ends, under tension. All of the strings are under the SAME tension and are otherwise identical, EXCEPT for their lengths. The variables in these situations, in addition to the lengths (L) of...

Has anyone out there actually tried the kitchen experiment of placing a continuous line of meltable food (i.e. marshmellows/chocholate/cheese etc.) across the bottom of a microwave oven in hopes of finding the antinodes of a standing wave by looking for regions that melt while the rest of the...

When a reflector is added to the previous setup, as shown in Figure 9 (page 201), a standing wave can be created. We are using a different detector in this case. Measuring the detector output as a function of distance along the goniometer (look it up!), we see that there are maxima and minima in...

[SOLVED] Standing Waves on a String with a Free End Problem. A string can have a "free" end if that end is attached to a ring that can slide without friction on a vertical pole. Determine the wavelengths of the resonant vibrations of such a string with one end fixed and the other free. By...

why there is a need to supply energy to maintain a standing wave?

Can somebody explain how standing waves are formed (both open end and closed end) and what exactly they are?

Why do standing waves only exist when \lambda=2L/n? For example why don't they exist when \lambda=4L Not really sure but if \lambda equals 4L then there is only going to be one "loop", I am guessing this has somehting to do with it but I am not sure how to explain it.

The problem is as follows: "A string exhibits standing waves with 4 antinodes when a mass of 200 g is hanging over the pulley (see attached figure). What mass will produce a standing wave pattern with 6 antinodes?" The equations that I have found in the relevant section of the text are as...

A string of fixed length L=1.200m is vibrated at a fixed frequency of f=120.0Hz. The tension, Ts, of the string can be varied. Standing waves with fewer than seven nodes are observed on the string when the tension is 2.654N and 4.147N, but not for any intermediate tension. What is the linear...

if a standing wave is a wave which transfers no energy, how is it that a guitar string produces a sound? because it produces it via a standing wave, and the sound is sound energy, so where does the energy come from?

Evening, Ive been having some trouble with questions about fundamental frequencies and labelling nodes and anti nodes in an air column. for example :a tuning fork is placed above a glass tube and then the sound of the air column is adjusted by raising or lowering the glass tube in the...

Sir, I have some doubts regarding standing waves. Can anyone who is online now clear my doubts? For the production of standing waves should the 2 interfering waves have the same amplitude, should they be in phase, should they have the same frequency and velocity? I have this doubt because...

Help with understanding end correction I missed a lesson at school on end correction of standing waves in pipes. I have a vague understanding of them, but can anyone give me an idiot's guide to end correction? Most websites I've had a look at haven't been too helpful in explaining it. Now...

I have to write an error analysis for my lab report, but am having some trouble making my sources of error clear and precise. The lab itself was a very basic investigation of the relationship between the tension, frequency, and mass per unit length (mu) in a standing wave pattern. Some...

How are standing waves necessary for the research industry? I found some information regarding x-rays, but it's all a little too difficult for me to understand. I just need a short list of fields where standing waves have been useful. Thank you.

I have two questions regarding Standing Waves. [i.] Suppose two speakers face each other with 'x' distance between them. They have = frequency. If i were told to find the points of minimum or maximum interference (or sound pressure amplitude) between the speakers, what excactly am i...

1.) S and P waves, simultaneously radiated from the hypocenter of an earthquake, are received at a seismographic station 17.3 s apart. Assume the waves have traveled over the same path at speeds of 4.50 km/s and 7.80 km/s. Find the distance from the seismograph to the hypocenter of the quake...

When a musical string (guitar etc) is struck a standing wave the length of the string is set up with a frequency X. Also many harmonics are set up with frequencies 2X, 3X, 4X... From my physics textbooks I can understand how by shaking a piece of string (with one end fixed) at the right...

I have two waves in a string. One of them is given below, where x is in cm and t is in seconds. y=40cos\frac{\pi}{4}\((0.5x-4t-0.4) I have to find second to produces standing waves when added to the first wave. I know how to add two waves were they are given. Can I get hint on this one...

Why is the density of standing waves in a cavity G(f)df=((8*pi*f^2)/(c^3))*df? Also that formula looks weird... doesn't look like it has anything to do with density...

The expression T(tension)/(mu*f^2) shows that no matter what the tension, and frequency are, as long as there are the same amount of nodes in the string, the ratio is always the same. The reason that the ratio in the previous part always comes out the same, regardless of which of the many...

Standing Waves help! 30 mins left. Hello everyone who's here, so far I've been doing great on waves, but what the heck is standing eave? Here is a problem that I kinda get, but not completely: Two strings, with the same mass/length m oscillate with the same frequency f=2.00 Hz. The first...

I am reading an article on black holes and they state, "Now what kinds of waves are possible inside a black hole? The answer is standing waves, waves that "fit" inside the black hole with a node at the event horizon." Can anyone explain to me why they know the answer is standing waves, and...

The velocity of waves on a string is 92 m/s. If the frequency of standing waves is 475Hz, how far apart are two adjacent nodes? W = Wavelenght f = v/W W = 92/475 = 0.194 m At this stage, I thought the answer was sufficient. However, maybe it is because i don't udnerstand the...

so my problem deals with resonance in standing waves if you have a standing wave in a long pipe of length 2.90m and that is closed on the left end and open on the right end and the graph of it is as below, with x-axis the position along pipe and y-axis vertical air displacement...

Standing waves on strings... :smile: I understand how to produce standing waves on a string when we have a vibrator at one end, as you usually use in demonstrations in physics classes. ie - increase frequencies until we achieve the correct kind of interference to produce standing wave...

Hi We just did a lab on waves and one in particular I'm unsure about. We set up standing waves on a spring and observed the period of each successive harmonic. It was found that the period was cut in half with each harmonic. Or the frequency was doubled. ie. harmonic 1 produced one...

Two loudspeakers face each other, vibrate in phase, and produce identical 438-Hz tones. A listener walks from one speaker toward the other at a constant speed and hears the loudness change (loud-soft-loud) at a frequency of 3.3 Hz. The speed of sound is 343 m/s. What is the walking speed?

hello i have got to these questions in my homework and have no idea how to start them, if anyone can point me in the correct direction i will be greatfull. these questions are to do with a guitar. the fundamental standing wave pattern shown produces a note of frequency 280hz is a...

Hi, I am a student of physics. I want to know why we call standing waves as waves because wave transmit energy but standing waves don't transfer energy. Secondly how standing waves are produced in H atom where there is only 1 electron. Why the colour of sky is blue at day time and why it is...