Question: If I understand correctly, an object's color is determined by the optical frequency which it does not absorb. So an apple appears red because it only reflects red. My question is, if this is true, why do we get mirror effects from dark surfaces? For example, one can often see multicolored reflections from a dark vehicle, or a dark computer screen. If an object is black, it should absorb all visible frequencies, so how come we can see colors (sometimes even white light) reflecting from a dark object as if it were a mirror?
My attempt: optical frequencies are not my specialty, but from thinking about it, the only thing I can conclude is that these objects are not truly "black". Rather, they are some combination of colors that seems almost black until white light shines on it. If this is true though, it also raises the question of a truly black object being possible to fabricate.