What's the difference between a single mirror and a double mirror in a hotel?

The hotel's one-sided mirror is safe. According to the query attribute network display.

1, because only one side of a single-sided mirror is a mirror, and nothing can be seen on the other side.

2. Double-sided mirror is also called single-sided perspective glass. This kind of glass can reflect most of the projected light back to achieve the effect that you can't see inside and you can see inside outside. The cost of a double mirror is higher.

3. So one-sided mirror can protect privacy and be safer. It is transparent on both sides. If it shines on one side of the mirror and can be seen on the other side, it is a double mirror, which is not safe.