All Questions
39
questions
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Photon emission rate frequency dependency
I am puzzling over the dependence of the energy flux of electromagnetic radiation on the frequency of the source.
The power radiated in any direction or solid angle from a charged particle ...
- 1,030
4
votes
2
answers
341
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Frequency of the photon in general relativity
There is an observer at ($r,\theta, \phi$) outside of the Schwarzschild blackhole. A beacon is falling into the black hole along $r$ coordinates of the metric and is emitting radiation. At $r_{em}$, ...
- 299
1
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0
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31
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Integrating Planck's relation
By Planck relation, we know that an energy of a single photon is $E = hf$.
If we are given EM-waves with interval of frequency $f_1$ to $f_2$, does integrating from
$\int_{f1}^{f2} Edf$ $=\int_{f1}^{...
- 275
1
vote
2
answers
354
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Are gamma rays the limit of the frequency photons can attain, and if yes, why? [duplicate]
Recalling that the Planck constant is $6.62607015 \times 10^{-34} m^2kg/s$ and taking into account the formula $E=hf$, for the energy of photons, we can rapidly derive the energy of gamma rays, which ...
- 143
0
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2
answers
519
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Frequency of EM waves in classical and quantum physics
In classical physics, when a charged particle oscillates, it emits an electromagnetic wave, and the frequency of the wave depends on the frequency with which the particle oscillates.
But in quantum ...
14
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5
answers
2k
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Why does light have multiple frequencies?
The wavelength of visible light ranges from 750 - 400 nm, and so do the corresponding frequencies. However, a photon only has one frequency, given by $E =h\nu$, at a given time, and it can’t be ...
- 697
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0
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66
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Upper limit of energy carried by one photon [duplicate]
energy carried by one photon, $E = hυ$ where $υ$ is frequency and $h =$ planck constant. Is there any upper limit to how much energy one photon can carry? or any upper limit of frequency?
- 67
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2
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66
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The energy of the photon $hf$, so what is the energy of other masses such as the Earth?
The energy of the photon $hf$, so what is the energy of other masses, and of course I do not mean to write in frequency $f$, what is the relationship of the energy of other masses
- 95
2
votes
1
answer
473
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Is photon a wavepacket of electromagnetic field?
Photon is a "particle of light". Light is just a propagating EM field. Therefore photon is (at least intuitively) a localized EM field (i.e. wavepacket).
In quantum optics, the Hamiltonian ...
- 207
-1
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2
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56
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EM waves/ photons
For an oscillating charge that produces a spherical wave, the energy of the wave at a point $r$ is proportional to its $A^2$, where $A$ is the amplitude (which we can see from the Poynting vector).
...
- 6,636
0
votes
1
answer
170
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If space is continuous, then frequency and photon energy too? [duplicate]
Photon is the quantum of light, i.e., energy comes in discrete level. But EM energy is a function of frequency ($E=hf$). And if frequency has a continuous spectrum, then energy level is continuous, ...
- 137
1
vote
3
answers
512
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Comparing a 100W and a 40W light bulb that only emits a specfic frequency
I'm sort of confused by this... let's just say the bulbs only emits green light, and we compare a 40 W and 100 W bulb (identical except one is brighter than the other), since the frequency of light ...
4
votes
1
answer
114
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What is the energy spectrum of all photons in the observable universe?
Does anyone know what the energy spectrum for the entire universe looks like? In other words, what would the graph look like if you plotted the number of photons on the $y$-axis and frequency on the $...
- 555
0
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0
answers
34
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What is the highest possible energy of a photon? [duplicate]
Are following suggestions ok to cap the energy of a photon?
When the photons have enough energy in a small enough volume to collapse into a black hole
When the wavelength of the photons becomes the ...
- 369
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3
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1k
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How can photons have frequency without vibration? [duplicate]
If photons have frequency then they must vibrate. So i was wondering, what kind of vibration do photons have? But according to physicists, photons do not vibrate. Can someone explain me, how is that ...
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