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Could it be because the radiation from the sun at high wavelengths is too low


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In the linear oscillation regime (most of the time this is how we treat sound), the speed of sound is constant and depends on the conditions (at least for gases this is true). For "normal" conditions ($20 ^{o}C$ and about 50% relative humidity) this is usually taken to be somewhere between $340 m/s$ and $343 m/s$. Jinawee has already provided a link to the ...


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User77601 is correct regarding the transfer matrix method. Most probably it would provide some reasonably good results and they will, most probably, be better than just assuming that the sound will be affected equally by both surfaces. You have to keep in mind though that you should include the air gaps between the materials if this is possible. It's ...


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When the potential is not exactly harmonic (and of course in reality it never is), a charge moving in the potential will not execute a purely harmonic motion. Its electrical field will be periodic, and a Fourier transform will show overtones: components at integer multiples of the fundamental.


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An overtone, more precisely is an integer multiple of a base (the least) frequency. If the base frequency is $\nu$ then the first overtone, also known as the second harmonic, is the frequency $2\nu$. And so on for subsequent overtones. These quantised (multiples of a base) frequency is a feature of a system that is constrained to move within a fixed ...


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The imaginary part of the complex vector corresponds to the decay magnitude and the decay direction. The real part of the complex vector corresponds to the spatial oscillation frequency and the direction of oscillation. In general, the decay and trig oscillation directions can be different.


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Rob Jeffries already has an excellent answer. I shall just add an image and some numbers to that answer. The spectrum in the presence of magnetic field will split certain absorption lines. The splitting $\Delta$ is proportional to the magnetic field strength. This splitting depends on the magnetic moment of the parent atom which is generally of the order of $...


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One way is through the Zeeman effect. The presence of a magnetic field in the region where the absorption line originates can split the energy levels of an atom into multiple components. Transitions between these split energy states then lead to absorption lines with multiple components at separate wavelengths. The number of components and the size of the ...


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No, it isn't talking about sound absorption; it is taking about absorption of radiation (see first sentence of the introduction on page 1). Here is a possible starting point: https://www.acs.psu.edu/drussell/Demos/Absorption/Absorption.html (apart from the graph, it cites a couple of papers at the bottom).


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This is an interesting question, the most interesting questions are usally what a child will ask. They are not easy to answer. First we will stick to the particle model of light. Imagine we have a stream of white light which is collimated that is the photons are basically tarvelling in the same direction, they then are passed into a clear tube containing say ...


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