Questions tagged [resonance]

Resonance is a characteristic of physical systems having a structure that allows energy to flow between various states at a specific, oscillatory rate (resonant frequency). For a stable resonant system at steady state the internal energy is either fixed without losses or the rate of energy input is equal to the energy losses.

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Why resonance occurs at only standing wave frequencies in fixed string?

I could not understand why only certain discrete frequencies are allowed in a fixed-ended string. How does the string behave if we excite it with frequencies other than resonant frequencies?
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What does resonance conceptually mean in coupled Oscillators?

In Forced oscillations, resonant frequency is the frequency at which amplitude is maximum. So what do resonant frequencies mean in coupled oscillators (since they are not corresponding to maximum ...
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References for the meaning and conditions for resonance in coupled oscillators

I am looking for any references (books, articles, lecture slides) or Answers regarding Resonance in Coupled oscillators. I would like to know what resonance means in coupled oscillators and the ...
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Resonance curve of a Harmonic oscillator

The resonance curve of a damped harmonic oscillator has a peak at the resonant frequency $\omega_0$. If the damping coefficient $\gamma$ is more then the peak is lower, compared to before, i.e the ...
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Behaviour of 2 resonant tuning forks in a vacuum

The scenario is the following. Two perfectly tuned resonant tuning forks A,B are placed in the same vacuum. [ Ideally the experiment is conducted when both A&B are in free fall]. Tuning fork A is ...
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Earth's atmosphere as an oscillator

I have read that earth's atmosphere is an oscillator because it is effectively revolving about the earth. However, this is an example of forced oscillations because the moon also effect it with it's ...
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How is the electron cloud oscillating during localized surface plasmon resonance with respect to the electromagnetic wave?

I have seen many illustrations like this for example (from Wikipedia) where the induced electric field in the nanoparticle is opposite to the one in the electromagnetic wave. This is the most common ...
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Can particles running in a loop go on-shell and does this create a “resonant” effect?

Are there any Loop diagrams, where we need to consider the internal propagator with a additional $i\Gamma m$ in the denominator to get a finite result (apart from adding counterterms). If yes does ...
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Coupling of resonant modes in a 1D Photonic Crystal

In 1D Photonic crystals, a defect can be introduced to create a defect/resonance mode and enable transmission. At first considerations, the thickness of the single defect layer determines the ...
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If frequency is the characteristic of a source and remains constant why does it increase when tension of a string is increased?

So as I've been taught,Frequency is a characteristic of the source and it does not change. But,then there are questions where when the tension of a string increased and frequency increases. Can anyone ...
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Confusing definitions of standing waves

I have come across two different definitions of standing waves, which confuses me since I cannot relate these two definitions. Question For standing waves, how is resonance related to superposition ...
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Waveguide modes: does a particular mode only propagate for one particular frequency?

I am trying to understand modes in a cylindrical dielectric waveguide. Does a particular mode only propagate for one particular frequency? Or, does a mode exist simply as long as the signal is above ...
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Resonant tunneling for wavepackets, simulation - what exactly is happening here?

I have been learning various ways to solve TDSE and naturally, wavepacket motion seemed like a good test case to check the algorithms. Then, of course, I wanted to see one of the most interesting ...
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Ultrasonic waves through metals

Might ultrasonic cleaning process/exposure influence or change the acoustic/resonance of a solid silver or solid gold flute? Might ultrasonic cleaning process/exposure weaken or damage parts of that ...
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Resonance frequency of a guitar

I have some questions for you about the resonance phenomenon in a guitar: Why resonance frequency are only full integer multiples of the natural frequency, such as 2 x, 3 x, or 4 x or 3 x, 5 x, or 7 ...
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Two objects oscillating out of phase in water, do they attract?

Two objects in water oscillate out of phase, close enough for waves to influence one another, do they attract?
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$LC$ in parallel with $R$ circucit resonance

I've been doing an experiment which involves measuring the voltage across the capacitor at different driving frequencies. Consider the circuit below: A sketch of the experimental curve $(R_1<R_2&...
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Breit-Wigner formula derivation

I have been going over this derivation of the Breit-Wigner formula for resonance in particle physics but cannot reconcile the steps with my knowledge of QM. The initial state is given by: $$ \psi(t)=\...
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Are unstable particles created with an exact mass, or masses distributed in resonances?

I'm pretty comfortable with QFT, but this is a conceptual point I feel shaky on. For example, when creating $Z$ bosons in a process like $e^+ e^- \rightarrow Z Z \rightarrow f^+ f^- f^+ f^-$, the $Z$ ...
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Making sense of cavity in a 3 ropes system

I fail to understand why cavity resonance happens. Let's say for the sake of example we have 3 ropes, the first and the last half-infinite and the middle one is of some length $L$. Now, we generally ...
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Exactly what is the cause for the zero reactance seen in the impedance at the center feed point of a resonant half wave dipole?

Lots of explanations i've read on the internet written by ham radio operators and in some text books state that a half wave dipole is resonant when the inductive and capacitive reactances cancel out. ...
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Impact of mass on resonance

Two questions ...why is it that increasing the mass of a mass-spring system increases the resonance amplitude? And why is it that increasing mass causes its resonance curve to be 'narrower' - i.e. it ...
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Do black holes resonate?

Merging black holes undergo a phenomenon called "ring-down" after the merger. If a black hole were to be perturbed by a hypothetical gravitational wave, would it exhibit a resonance type ...
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Relation between stress and resonance

I am working on a project to measure the stress in metals so I am looking for a variable that changes directly with stress. I noticed that when hitting a metal (unstressed) (say iron) by another metal ...
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What does the orbit of Pluto look like from the perspective of Neptune?

Pluto is locked in 3:2 resonance with Neptune, so that means that it should be possible to generate a simple looping animation that shows what movements Pluto would make given 2 orbits of Neptune. I ...
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Potential error in a physics exercise [closed]

My physics textbook has the following exercise: My grasp on the problem is that the situation is similar to than of an organ pipe closed at one end. As such, standing waves would be set up in the ...
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Does a object always ring at resonant frequency?

I'm trying to find the resonant frequency of glass panes and how the resonant frequency is affected by the thickness of the glass pane. I set up the glass pane with the ends of the glass pane fixed. (...
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What is the purpose of resonators in quantum circuits?

I have been studying about quantum circuits, and I have come across resonators or microwave resonators multiple times. I do have a vague idea about them but I am not able to understand what is their ...
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What does it mean if a circuit has 2 resonances?

I was going through capacitive coupling of qubits, and someone said to me that if we couple qubits with a capacitor we have 2 resonances. I do not understand, what does it mean to have 2 resonances.
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Bandwidth of a RLC Circuit

Bandwidth of an RLC circuit is defined as the angular frequency difference for which Power dissipated through circuit is half of that dissipated at resonance. What is so special about this range that ...
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How to calculate properties of a coupled electromagnetic / mechanical oscillator?

I'd like to study a class of systems which are (essentially) coupled electromagnetic/acoustic oscillators which can act as antennas for an electromagnetic field, but also can vibrate mechanically with ...
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How do I describe the following system? [closed]

So the professor of my physics 3 class assigned this problem regarding forced oscillations. A mass of 0.30kg hangs of a massless rope. The center of oscillation can move as shown in the figure. When ...
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Analytically understanding wireless power transfer

https://youtu.be/M8aZoM9p43k This YouTube link shows a experiment I quickly made. Two resonant lc circuits that use magnetic fields to wirelessly light up a led. I manually found the best frequency ...
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Resonance and standing waves on a bar [closed]

I'm having trouble solving this problem: By applying a harmonic force, acting on the end of a free bar of length $L$, a standing wave is formed due to multiple reflections: Where are the nodes of ...
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How would I go about finding the resonant frequency of a glass pane?

I've done some research, and found some videos and articles on how I could find the resonant frequency of normal objects - By hitting them, and then finding the frequency using a software. But the ...
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Frequency of human body - EM vs vibrational?

Apologies for the noob question. I have seen people calculate the wavelength of the human body based on weins law as follows: 0.002898/310 = 0.00000934838 m ...
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Detection of resonance particles

why we detect an increment in the number of events of the reactions for the energy of resonance particles? I read that cross section of this new unstable particle must be added to the cross section of ...
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Fabry-Perot Finesse vs Ring Resonator

Why is the finesse of a fabry-perot resonator given by $2\pi/\text{RTL}$ while the finesse of a ring resonator is given by $\pi/\text{RTL}$? The finesse of a fabry-perot resonator is given by $F = 2\...
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Why does mass-spring system tend or prefer to oscillate with natural frequency? Can you explain it theoretically rather the derived version of it? [closed]

Why the mass spring system prefers to oscillate at natural frequency, why does it rather oscillate at other frequencies? Every object in the universe is always vibrating, is it true? if it is the ...
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The notion of TEM, TE and TM modes in an arbitrarily shaped cavity

In order to define the usual modes of EM waves in a confined space, TEM, TE and TM, one must have a well defined notion of "transverse" and "longitudinal" in the system. In the ...
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Free Spectral Range versus Axial Mode Spacing?

I am doing research on micro cavity frequency combs and I've been trying to understand things like dispersion, Free Spectral range, resonance, and modes. I am looking at the definition of free ...
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Resonance frequency with metal

I've made an experiment with resonance frequency of a LC circuit. One part was to place a metal (I think iron) in the middle of the induktivity of LC circuit. I measured a higher resonance frequncy as ...
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Quality factor definition

During my study of oscillators I have encountered two different ways do define the Quality factor $Q$, which gives information about the amount of damping on a system. Suppose the oscillator equation ...
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What is the meaning of a non-resonant neutrino production?

What is the meaning of non-resonant production in the following context: They assumed a negligible primordial lepton number,or asymmetry, so the neutrinos are produced non-resonantly. [1] I thought ...
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Higher and lower frequencies than resonance frequency in an RLC circuit [closed]

I read in my high-school book that in a RLC circuit for frequencies lower than $f_{res}$, $X_C>X_L$ and for higher frequencies $X_L>X_C$, where $X_C$ is the resistance of a capacitor and $X_L$ ...
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Pressure dependency of the end node correction in a double-ended resonator

I have an acoustic resonator which is tube-shaped and open on both sides. The open ends of the tube open into a buffer volume. In the picture below I visualized my assumption. Measuring the resonance ...
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Why do standing waves filter out all other frequencies but its natural frequencies

I was wondering about how standing waves filter out all other frequencies. I read online that it's because the other frequencies destructively interfere with one another. However as hard as I try, I ...
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How do I show that as the mass ratio in a pendulum tuned mass damper system increases, the effect of damping increases?

A pendulum tuned mass damper installed on a building acts as a ‘counteragent’ during building excitation, absorbing some of the kinetic energy (K1 and K2) produced and thus mitigating the amplitude of ...
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Schumann resonance frequency

I keep hearing that Schumann resonances have been increasing rapidly in recent years. And that it was relatively stable before. I failed to find any scientific data proving or disproving this. I would ...

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