Questions tagged [wavelength]
The wavelength of a sinusoidal wave is the spatial period of the wave—the distance over which the wave's shape repeats, and the inverse of the spatial frequency or wavenumber. Determined by considering the distance between consecutive corresponding points of the same phase, such as crests. Use for wavenumber, wavelength, frequency.
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Why do we take vrms speed in de broglie wavelength not average speed for a gas
While solving many questions, I came across many solutions where we took v as vrms speed for de broglie wavelength of a gas but why can't we take v as average speed as it would give us average ...
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What is the frequency of a standing wave? [closed]
I understand that constructive interference of waves results in standing waves. And for a wire with both ends fixed the frequency should match the fundamental frequency of the wire to produce standing ...
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What is the mathematical support for the formula $f_n = n f_1$, used to calculate the frequency of a standing wave? [closed]
could someone explain to me the mathematical support for the formula $f_n = n f_1$. This formula refers to the fact that the frequency of a standing wave is equal to the number of antinodes times the ...
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Why does the length of an antenna matter when electromagnetic waves propagate perpendicular to the antenna?
The optimum length for a dipole antenna is a multiple of half the wavelength that it is designed to receive or emit. Why is this? If an electromagnetic wave has E in the x-axis, B in the y-axis, and ...
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Understanding Loop Formation in a Plucked String
I have a question regarding the formation of loops when a string is plucked at different fractional lengths.
In a book I referenced, it is stated that plucking a string at 1/6 of its length produces 3 ...
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At which wavelengths do photons behave like X-ray?
Hard X-rays of wavelengths of about an angstrom are very different than regular lights in a way that they can’t be reflected or refracted, which means their refractive index is always close to 1 ...
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Can the laser light, in principle, take any wavelength in the EM spectrum?
Can the laser light, in principle, take any wavelength in the EM spectrum? I don't think there is what prevent this in principle, right?
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How can photons interact with nuclei?
How can photons such as X-rays or gamma rays interact with the nuclei of atoms given that, as I understand it, the length scale of a nucleus is around a couple of femtometers? So, shouldn’t the size ...
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Why does oxygen green (S1) emission in aurorae only occur at lower altitudes? [duplicate]
Aurorae have a red color at high altitudes caused by the excitation of atomic oxygen and the subsequent emission at about $630 \,\text{nm}$. This happens at high altitudes because at that height there ...
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De Broglie wavelength and how it leads to the wave function
From what I know, de Broglie derived the wavelength equation using Einstein's $E=mc^2$ and the Einstein-Planck equation $E=h\nu$. My teacher explained this by saying an electron literally moves in ...
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Wavelength and frequency of the peak of the black body radiation [duplicate]
Why does the product of the peak wavelength and the peak frequency of Planck's black body radiation not equal to the speed of light?
$$λ_{\mathrm{max}}=\frac{hc}{4.97\mathrm{kT}},$$ while $$ν_{\mathrm{...
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How does flute work?
I started learning flute a few months ago. Here in India you can buy two types of flute hindustani and carnatic. Hindustani flute has a simple acoustics.
Lenth is inversely proportional to frequency.
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Could the increasing anisotropy of the universe lead to an additional blueshift?
I'm contemplating the possible sources of a wavelength-shift within our universe:
The CMB had a lot more energy when it was produced (around 3000 K). Due to the expansion of the universe, it has been ...
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Does the energy of a photon in comoving space change?
Assuming a flat FLRW universe that is expanding: In comoving space, does the energy of a photon decrease or stay constant? A physical argument for this would be nice.
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Why is the shorter the wavelength, the smaller the object you can image? and vice-versa?
I know that the shorter the wavelength the smaller the object you can image clearly. Why wavelength matters in imaging something? How having big wavelength wont let u image smaller object, like if u ...