I have two mirrors at the same height on opposite walls facing each other in my bathroom. I took a laser pointer and put it in between the mirrors and directed the beam at one, such to where the reflected beam hit the other mirror, and back on the first and so on. Anyway, I noticed probably 16 or more multiple reflections of that laser beam. Of course, each time the beam is relected a loss occurs. I understand that. My question is how many times can that beam be reflected between the mirrors before becoming too faint for me to see. Perhaps to put it in another way, what is the loss percentage of "standard glass mirrors"? Is it "generally" 1% or much higher? I realise that that depends on the specific materials used for mirror construction, but is there a "generalization"? Also, are there "mirrors out there that have a reflective loss percentage lower than 1%?