Mirrors are often (usually !) silver-- quick silver-- but i have seen bronze mirrors and other color mirrors.
I have an old mirror that i have to be careful when i move it- the mercury is detaching-- and i get beads of quick-silver! -- and a prism is way of seeing component color-- lt (the triangle of glass) lets us see the color component color so white light-- but did you ever shine a flash light beam into a prism-- and laser light enters and leaves a prism unchange in color --(of course--it is a single frequency of light--) but it does change direction...
obviously, the problem is, we use the same word for the triangluar piece of glass, as we do for the result of white light that enter the glass.
M-W word of the day is "sound" -- have you every smelled a sound? I have!-- an other word that has more than one meaning!
