What produced the old dead channel tv static audiovisuals on tvs?

ALostInquirer@lemm.ee to No Stupid Questions@lemmy.world – 175 points –
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3D render of old tv set with animated static on its screen, as if tuned to a dead channel.

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This is a very non scientific answer, but when I was a kid (good 40 years ago) I remember having a science book that called TV static "an echo of the big bang". I guess that would mean just randomly scattered energy bouncing around on all bands?...

I could probably Google it and give you an answer, but I'll just wait for someone with a more convincingly and authoritatively written reply.

Not all of it. But parts of it really are due to the cosmic microwave background radiation. Light from the moment the universe was transparent enough to let light spread. It's from about 300,000 years after the big bang if I recall correctly. It's the earliest image of the universe we have. And it's more or less everywhere.

but I'll just wait for someone with a more convincingly and authoritatively written reply.

Pfft sprayed my drink lol

Now that you mention it, I remember something similar! I may have to follow up on that to see (but I'm also curious of others' responses, hence asking).

Well apparently now astrophysicists are saying maybe the Big Bang didn’t happen. ¯_(ツ)_/¯

But it is still the result of background radiation, which is caused by something.

That's false. Most of them still agree that Big Bang happened, it is just that the first extra small fraction of a second of Big Bang can't be explained with our current understanding of physics, and there is still a lot of some unanswered questions about it.

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