All Questions
Tagged with material-science waves
22
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Physical interpretation of a dielectric's absorption curve
A given dielectric will behave as an absorbing medium for some frecuencies (those near one of the material's several resonant frequencies), whilst it will behave as a non-absorbing medium for the rest ...
- 1,616
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If a material is homogeneous in $\varepsilon$, can this material be made of different atoms?
I'm currently trying to derive the microscopic expression for the dielectric constant of a material following my proffessor's notes. However, he admits that, even though he assumes $\varepsilon=...
- 1,616
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32
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Mechanical wave traveling time in a medium
This stems out of my personal curiosity and it's not related to any homework of sort.
Suppose I have a table made of some uniform substance (like plastic), and then I strike some point of the table ...
- 194
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177
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Modes of vibration
I've been thinking that 'modes of vibration' refers to the frequencies which produce standing waves in a system. But now I'm confused, because ChatGPT gave me the below response for my question.
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2
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319
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Would sound get weaker in metal faster than in air over the same distance?
I'm finally closing some gaps in sound waves, so forgive me for lots of questions.
In metal, it's said sound travels fastest. The reason is molecules are tightly packed(more dense) in metals than in ...
- 525
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62
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Sound conduction in a stethoscope
i am trying to build a stethoscope and since i have no idea about physics and acoustics i wanted to ask some questions, hoping Somebody can help me.
I mainly have some questions regarding the tubing ...
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1
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59
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What formalism is used to model thin film optical coatings that function across a range of angles of incident light?
Thin film optical coatings [0] are atomically/molecularly thin layers of material applied to a substrate with the intent of affecting the optical properties of the substrate. For example, magnesium ...
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45
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Does the lithosphere have a resonant frequency?
In meteorological sciences, there is an important concept known as the Schumann resonance, which are the integer values of electromagnetic resonance between the surface and ionosphere. The values ...
- 477
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42
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Can electromagnetic standing waves be used to move particulates?
As detailed in this paper:
https://www.researchgate.net/publication/3941396_Ultrasonic_separation_of_suspended_particles
The researchers use the formation of acoustic standing waves to deposit ...
- 477
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3
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123
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Is it possible to sustain local oscillations in a three dimensional medium?
This is a highly abstract question.
Let's assume a medium which is three dimensional and is so huge that its practically infinite. Now let's say we are in the middle of it. Now is it possible to ...
- 145
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119
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Acoustic permeability of polypropylene
I've searched the web for the coefficient of acoustic permeability of polypropylene but couldn't find any.
I have a situation where there's a $3.3(mm)$ thick polypropylene layer over my target, and I'...
- 877
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How does acoustic impedance change with frequency of the wave and thickness of the medium?
I have read in many posts that the acoustic impedance of a material is usually defined as $Z = pc$, where $p$ is the density of the material under consideration and $c$ is the speed of sound in that ...
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Can a pressure wave travel faster than a material breaks?
Consider a shock wave travels through a solid (M) which causes a 4g acceleration. Down below there is an elastic spring (K1) which suppose to support the mass in case K2 will fail. K2 is a rigid body ...
- 11
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54
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Estimating the maximum frequency of waves on a fixed string?
I would like to understand if/how I can estimate an upper limit on the frequency of (standing) waves that can be generated on a string fixed at both ends.
As a first step, the properties of the ...
- 111
2
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87
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How should one determine the motion of extremely large extended objects?
[To put this question in context, I was reading "How much time will it take to move an object whose length is equal to one light year?" and don't really feel satisfied by the answer that has been ...
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