There are no CDs/DVDs that are first surface mirrors. There is always a protective plastic layer on the outside, same as with any normal household mirror (exce

There are no CDs/DVDs that are first surface mirrors. There is always a protective plastic layer on the outside, same as with any normal household mirror (except it might be glass in a household mirror; regardless, you will get internal reflections). This is the structure of a CD/DVD: https://cdn4.explainthatstuff.com/layer-structure-compact-disc.png https://cdn4.explainthatstuff.com/layer-structure-compact-di... I don't know where you got this idea from that CDs/DVDs can be first surface mirrors; they aren't. If they were they'd be really bad at their job, because one of the hallmarks of first surface mirrors is that they're incredibly fragile and do not stand up to any kind of handling whatsoever. That would not work for CDs/DVDs for obvious reasons. More info and diagrams here: https://www.clir.org/pubs/reports/pub121/sec3/ https://www.clir.org/pubs/reports/pub121/sec3/