Have you ever got undressed in a public changing room and felt as though you were being watched?
Or perhaps there’s something about the mirror you’re fixing your eyeliner in that just doesn’t sit quite right.
There could be a reason for your wariness: Two-way glass.
In case you’re not aware, two-way glass is a mirror where someone behind the glass can see you, but you can’t see them.
Surprisingly, it’s relatively easy to find out whether the mirror you are looking in is two-way glass – and it only involves your finger.
Place the tip of your fingernail against the mirror. Look closely to where you’re touching the mirror. If… Read the full story