this post was submitted on 11 Jan 2025
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Photons (lemmy.world)
submitted 1 week ago* (last edited 1 week ago) by ekZepp@lemmy.world to c/science_memes@mander.xyz
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[–] ryedaft@sh.itjust.works 52 points 1 week ago (5 children)

Photons don't gather energy and they definitely don't move slowly through the sun.

[–] Artyom@lemm.ee 49 points 1 week ago* (last edited 3 days ago)
  1. They're traveling in a medium, so they move slower than in space
  2. Due to the random walk caused by multiple scattering, it can take millions of years for a photon to escape the sun after being produced in the core.

You are right that they don't gather energy, but they do multiply. What would be a single high energy x ray in the core will eventually downscatter into an army of optical photons.

[–] bdonvr@thelemmy.club 37 points 1 week ago (2 children)

It can definitely take millions of years for photons to leave a star due to dense protons causing collisions.

https://futurism.com/photons-million-year-journey-center-sun

[–] stebo02@lemmy.dbzer0.com 7 points 1 week ago (2 children)

I get what you're saying but taking a long time is not the same as moving slowly

[–] stephen01king@lemmy.zip 18 points 1 week ago (2 children)

Slowly making their way does not equal moving slowly. It describes the time it takes to exit the sun, not the speed of the particle.

[–] stebo02@lemmy.dbzer0.com 3 points 1 week ago
[–] dave@feddit.uk 2 points 6 days ago (1 children)

They’re also rapidly making their way and taking a long time.

[–] Klear@lemmy.world 3 points 6 days ago

And cold wind is when slow-moving air hits you at a fast speed.

[–] pyre@lemmy.world 5 points 1 week ago (1 children)

v = d / t, so technically it is.

[–] stebo02@lemmy.dbzer0.com 4 points 1 week ago (1 children)

but the distance the photon travels is very large, just in random directions

[–] pyre@lemmy.world 1 points 6 days ago

I know I was being pedantic about your comment because I thought it was kinda funny interpreting it out of context.

[–] take6056@feddit.nl 8 points 1 week ago

For photons, their moving relatively slow from the inside to the outside of the sun. Although, I think, it's technically a bunch of photons bumping each other into existence.

[–] Nougat@fedia.io 4 points 1 week ago

... they definitely don't move slowly through the sun.

They kind of do. While the photons inside the Sun move at a very high speed, they can take up to about 170,000 years to get from the middle of the Sun to the outside, because they change directions a lot on the way.

[–] gubblebumbum@lemm.ee 2 points 1 week ago

also temperature doesn't really exist at that scale.