Originally posted by KS:
i heard this one was just internet myth:
You can test for a two way mirror by putting your fingernail on the surface, if there's space between the tip and the image, then its a normal mirror, if not, its two way.
true ... the reflective surface in a mirror is in the back, covered in glass. We did an experiment in Physics on reflection, and had to line up the mirror according to its backside.
CDs work in a similar fashion, which is why lightly scratching the bottom is ok, but writing on ball-point pen (on a blank CD-R) on the top is bad. This happened to me; I ruined the disc
because that surface is actually the material that contains the laser divots (or whatever they are).
