Why did old TVs produce an awfully loud static noise and weird visual when they had no signal rather than showing nothing like newer TVs do?
In: Technology
That static is the *cosmic microwave background*, which is a constant low-level bath of light in the radio/microwave range that’s probably the light from the very early universe* cooling down, and the smoking gun evidence for the Big Bang theory. It’s the same signal being picked up as radio static.
*Like, earlier than any stars, just a hot cloud of hydrogen atoms.
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