For example, in the same area, is a black ball similar in temperature w/ a white ball? Can we use this idea to make things we want to be colder colder, and hotter, hotter by recoloring it?
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As long as there are some rays around? Yea.
For example in in Israel they use a kind of solar water boiler that has a black plate aimed at the sun to catch all the heat to heat up water for household use.
On the other hand you got buildings in Greece painted white so they’ll get less hot in the summer sun.
This also works if you want specific rays, for example different plants have slightly different chlorophyll and because of that they absorve different wave lengths .
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