Some hotel bathrooms have flat mirrors, but they can magnify objects and seek the principle. Thank you!

This uses the principle of convex mirror, I think you know. Look at things with a magnifying glass, and what you see will be magnified. This kind of mirror is in the hotel. I think this hotel is a high-end hotel, or the service is very good, because it is very thoughtful. Because this kind of mirror is placed to better facilitate customers, for example, some people have acne on their faces, and many people like to squeeze it out, but ordinary flat mirrors can't see clearly. With this kind of mirror, we can better check the stains on our faces so as to deal with them better.

As for you, it looks very flat, which is caused by the different technologies of various manufacturers. Have a plenty of processing mirror, the radian of this kind of mirror is very small, and the convex surface is on the reverse side, which can't be seen from the front. The other is the problem of silver powder, which requires high technology, and I have only heard of it.