The fingernail test described above is a method for determining the difference between first-surface mirrors and second-surface mirrors, both of which are ordinary mirrors glazed in a different fashion. These panels are confusingly referred to as both "one-way mirrors" and "two-ways mirrors," so to avoid additional confusion we will henceforth call them "transparent mirrors." The subject this message addresses are panels which look like mirrors on one side but work like tinted windows from the other side - that is, if you're on one side of such a panel, it appears to be mirror in which you can see your reflection if you're on the other side, it serves as a window through which you can see everything (and everyone) on the other side. It is simple to do, and it might save you from getting "visually raped"!įirst off, we should clear up some confusing terminology. So remember, every time you see a mirror, do the "fingernail test". However, if your fingernail DIRECTLY TOUCHES the image of your nail, then BEWARE, for it is a 2-way mirror! You can further ascertain the nature of the suspect surface by hurling an object (e.g. Place the tip of your fingernail against the reflective surface and if there is a GAP between your fingernail and the image of the nail, then it is a GENUINE mirror. So, how do we determine with any amount of certainty? Well, once again, I am here to enlighten you. It is very difficult to positively identify the surface by just looking at it. they can see you, but you can't see them)? There have been many cases of people installing 2-way mirrors in female changing rooms. How many of you know for sure that the seemingly ordinary mirror hanging on the wall is a real mirror, or actually a 2-way mirror (i.e. When we visit toilets, bathrooms, hotel rooms, changing rooms, etc. Many would-be peeping toms still resort to less technologically-advanced methods such as peepholes and two-way mirrors, though, hence a warning which began circulating on the Internet in April 1999: With the recent advancements in miniaturized electronics, it's hard for any of us to know we're not being spied upon these days cameras and transmitters can now be made so small and unobtrusive that most of us wouldn't be able to find them even if we knew where to look for them.
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