Transparency of the sun to extremely long wavelength photons

In summary, according to the authors, the sun is transparent to low energy photons that are produced inside of it, and the individual photons have very low energy. The sun might produce a few of these photons, and the surface area of the sun does not seem to be very important in calculating the power emitted.
  • #1
tasp77
74
0
Hi, new here.

This came up briefly elsewhere and we didn't have the cerebral fire power to get very far with it.

Consider very, very long wavelength photons, (or conversely, very very low energy photons) produced inside the sun. Wavelengths we are looking at are in the range of 1 light year up 13 billion light years or so, the maximum size wavelength possible in our universe in this era. (or would that 'other' number apply?)

Do these photons escape from inside the sun? Considering the difficulty in making an antenna for these wavelengths (there are rather large), we think the sun is essentially transparent to this radiation.

We were also looking at the power output of the sun at these wavelengths, the individual photons are of vanishingly low energy, but, conversely, there might be quit a few of them.

We were looking at some solar luminosity formula, but one of the terms was for surface area of the sun, if the entire mass of the sun radiates at these wavelengths, is the surface area of the sun important in calculating the power emitted?

And if this all physics 101 topics, my apologies.
 
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  • #2
If you speak about wavelengths bigger than diameter of Sun, it makes little sense to think about transparency of the Sun. Waves of such wavelengths cannot be localized precisely enough to say if they go through the Sun, or pass it by.
 
  • #3
Yes, any such photons 'passing by' from elsewhere in the universe will 'ignore' the sun, but what of photons like that produced inside the sun itself?
 
  • #4
What reason do you have to believe such photons are even produced by the sun?
 
  • #5
tasp77 said:
Yes, any such photons 'passing by' from elsewhere in the universe will 'ignore' the sun, but what of photons like that produced inside the sun itself?
Then, as the E-M wave representing them is much longer than your object (Sun), they are not flat waves, as you used to analyse in optics, but rather are dominated by magnetic or electric part. And you should ask what happen if you put a ferrite antenna in the middle of the SUn, and how its magnetic field is screened. Or what happens if you put 1/10000000 wavelength long dipole and what would be its emission.
My intuition tells me that in both cases the screening will be close to perfect.
 
  • #6
Clever-Name said:
What reason do you have to believe such photons are even produced by the sun?



Because the sun is warmer than absolute zero.


(Sorry, don't mean to be snarky, but I think that is what is needed to generate these guys. My understanding is the only photons 'forbidden' are those with wavelengths exceeding the size of the universe.)
 
  • #7
As for the transparency of the sun to these very low energy photons, if any externally generated ones were passing by (say they are relics of the BB), the sun would be unable to intercept any of them because of it's small relative size, so if such a photon happened to be produced in side the sun, wouldn't it too find the sun to not be an impediment to it's passage out?
 
  • #8
tasp77 said:
Because the sun is warmer than absolute zero.


(Sorry, don't mean to be snarky, but I think that is what is needed to generate these guys. My understanding is the only photons 'forbidden' are those with wavelengths exceeding the size of the universe.)

Just because something isn't 'forbidden' by a certain physical law is not sufficient to guarantee existence. Unicorns are not 'forbidden', and yet they are hardly ubiquitous. If you know of an observed physical process which generates extremely long wavelength radiation, then your the answer to your question will have some meaning.
 

1. How transparent is the sun to extremely long wavelength photons?

The sun is largely transparent to extremely long wavelength photons, such as radio waves and infrared radiation. This means that these types of photons can easily pass through the sun's outer layers without being absorbed or scattered.

2. Why are extremely long wavelength photons able to pass through the sun?

This is due to the composition of the sun's outer layers, which are made up of gases and plasma. These materials are not dense enough to absorb or scatter the longer wavelength photons, allowing them to pass through relatively unimpeded.

3. What is the relationship between the sun's transparency and its temperature?

The sun's transparency to extremely long wavelength photons is largely influenced by its high temperature. As the temperature of the sun increases, the energy of the photons also increases, making them less susceptible to absorption or scattering by the sun's outer layers.

4. How does the transparency of the sun affect the Earth's climate?

The sun's transparency to extremely long wavelength photons plays a crucial role in the Earth's climate. These photons are a major source of heat for our planet, as they are able to penetrate the Earth's atmosphere and warm the surface. Without this transparency, our planet would be much colder.

5. Are there any exceptions to the sun's transparency to extremely long wavelength photons?

While the sun is largely transparent to these types of photons, there are some exceptions. For example, extremely long wavelength photons that are emitted from the sun during solar flares can be absorbed by the Earth's atmosphere, causing disruptions to communication and navigation systems.

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