Yes. If that wasn't so, (and the shiny ball DID absorb heat slower), I'm pretty sure you could make a perpetual motion machine. You could also make one-half of the shiny ball rusty and still see the same effect.
Some web page on this stuff. https://reliabilityweb.com/articles/entry/a-practical-guide-to-emissivity-in-infrared-inspections
Yes.
That violates Kirchhoff's Law.
If that wasn't so, (and the shiny ball DID absorb heat slower), I'm pretty sure you could make a perpetual motion machine.
You mean you wouldn't be able to make a perpetual motion machine because there would be no thermal gradient that could be used to do work.
Kirchhoff's Law
What do electrical circuits have to do with infrared emissions?
https://en.wikipedia.org/wiki/Kirchhoff%27s_law_of_thermal_radiation
Basically. an object cannot radiate more or less heat than it absorbs.
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