Mirror has a silver coating which helps it reflect all colors of light. From my classical understanding, silver atoms reflect light by absorbing it and then emitting it at the same angle to the normal.
From QED, the angle of reflection is basically the result of application of principle of least action, but it doesn't rlly explain what happens at/within the atom (from what I gathered). So do we know what rlly happens within the atom to produce the exact same angle?
Also, how does mirror emit the exact same frequency of light, and how does it reflect all frequencies of visible light? Silver atoms can only absorb specific wavelengths and re emit them. So how does it"reflect"all kinds of colors?