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Photons from centre of sun
I keep seeing widely varying figures for how long it takes a typical
photon to make its way from the sun's core to the outside and for example reach earth. I have seen 1 million yeras, 100 thousand, a few thousand. Anyone give authoritative estimate for this "random walking" phenomenon? Thanks |
#2
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Photons from centre of sun
Carusus wrote:
I keep seeing widely varying figures for how long it takes a typical photon to make its way from the sun's core to the outside and for example reach earth. I have seen 1 million yeras, 100 thousand, a few thousand. Anyone give authoritative estimate for this "random walking" phenomenon? The reason for the disparity is that there are different models for the process which predict different average times. As more observations are made, it is hoped that some of these models will fall by the wayside while others continue to persist. But the models differ from anything like initial conditions to spacing in the iterations and can only be differentiated from each other with better observations to compare to their predicted outputs. |
#3
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Photons from centre of sun
Hi Carusus This comes under the uncertainty principle. Some photons
will come right through as gamma photons. Most photons on leaving the fusion core will be absorbed emitted,bounced around and take 100,000 years to break through the sun's surface. They all leave the core as gamma photon(for the most part) but we see them as white,for that means they come to earth with mixed wave lengths (different energies) They really did not slow down going through the sun,but did cover a much greater distance. Bert |
#4
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Photons from centre of sun
Thanks Bert.
Obviously there will be considerable variety in the times if I think about it. G=EMC^2 Glazier wrote: Hi Carusus This comes under the uncertainty principle. Some photons will come right through as gamma photons. Most photons on leaving the fusion core will be absorbed emitted,bounced around and take 100,000 years to break through the sun's surface. They all leave the core as gamma photon(for the most part) but we see them as white,for that means they come to earth with mixed wave lengths (different energies) They really did not slow down going through the sun,but did cover a much greater distance. Bert |
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