Why do you have to knock on the mirror before staying in a hotel?

When traveling, most people will choose to stay in a hotel, which is convenient and comfortable and can bring great benefits to their travel. But have you ever noticed the mirror in the hotel? There may be something fishy in this.

There are generally many mirrors in hotels, and there are usually some in bathrooms and rooms. First, for the beauty of the hotel, it will be spacious and bright, but for the convenience of passengers. It is more convenient to wash and make up with a mirror. But there are also some perverts who make a scene in the mirror. If you are not careful, it may be all gone.

Some people say that when you stay in a hotel, you should knock on the mirror when you enter the door!

Some people will peep through the hotel mirror. When you admire your beautiful face in front of the mirror, there is actually a person admiring your beautiful face. You see an ordinary mirror, which is actually not a mirror, but a specially treated double mirror. This kind of double mirror is generally used in cars. People sitting in the car can see the outside clearly, but people outside the car can't see everything inside. When you look in this mirror, you look like the person outside the car, and peeping tom is the person inside the car. You can't see anything, but the people outside the car can see everything.

So how do we judge whether a mirror is a double mirror? The first simple method is to point your finger at the mirror and see the distance between your finger and the mirror. If there is a distance between your fingertips and the image in the mirror, it is a one-sided mirror. If there is no distance between your fingertips and the image in the mirror, it is a double mirror, and you may have been exposed to others' sight.

Brightness judging method

The double-sided mirror uses about 50%~70% reflective layer, so it is darker than the ordinary mirror. Take out the cosmetic mirrors you carry with you and compare them together to see if there is a big difference in brightness.

Disadvantages: this method is easy to misjudge, and there may be color difference between mirrors.

The method of "the enemy is clear and we are dark"

A feature of a double mirror is that it can see the bright side from the dark side. So, if you turn off the light on your side, you will see the opposite scene (provided that there is a certain brightness on the opposite side).

Remember to turn off the lights and close the curtains when you sleep at night!

Leave the room in a dark state without any light. The darker the room, the better the inspection status! Then turn on the camera function of the mobile phone and walk around the room to see the dead angle and ceiling of the room. Television, air conditioning and other places where pinhole cameras may be installed. If there is a pinhole camera, you will see a red dot on your mobile phone. The red dot is a camera.

Friends who often travel or travel will inevitably encounter such a thing as staying in a hotel, but the hygiene of the hotel makes many people worry. In fact, as long as you prepare some "dirty" items, your travel life will be more exciting!

Hotel mouthwash cups can't be used either, so bring your own. With this set cup, you can ensure the cleanliness of your toothpaste and toothbrush, and you can use it directly as a mouthwash cup, which is really convenient.

Worried that the hotel sheets are not clean? Then bring one of your own, separate the dirty sleeping bags and help you solve the embarrassment of small cleanliness! The pure cotton fabric is super comfortable, and it is not afraid of cross-infection when sleeping naked.