Can the X-ray machine see the title of the book in the bag during the security check? What's in it?

I can't. X-ray is an electromagnetic wave that can penetrate opaque objects such as wood, cardboard and leather. The security detector can present images of different colors on the screen according to the degree of absorption of X-rays by objects.

Simply put, orange stands for organic matter, such as food, plastic and so on. Books, ceramics, etc. Displayed in green; The metal is shown in blue. At this time, the security inspector can quickly check the perspective image of X-ray scanning and judge whether there are contraband with rich experience.

Extended data:

Only properly trained personnel can install and use the security inspection machine. Radiation safety rules must be strictly observed at all times to avoid radiation injury.

1) Only properly trained personnel can install and use the security inspection machine.

2) Only technicians can remove the cover plate or protective parts during maintenance.

3) Don't use X-ray safety inspection equipment outdoors.

4) The security inspection machine must work under the specified working voltage. Before using the equipment, the voltage used must be checked.

5) The security inspection machine must have a good grounding. Equipment sockets used in the installation site must have grounding terminals.

6) If the voltage fluctuation exceeds the specified area, it is recommended to use AC voltage regulator.

7) Do not connect any electronic components that do not belong to the X-ray safety inspection equipment to the power distributor of the X-ray safety inspection equipment.

8) Any improper modification may damage the X-ray safety inspection equipment. Users are prohibited from making improper changes to the equipment.

9) The security machine can only be used to check items, and it is forbidden to check people or animals.

10) Do not turn on the equipment that has not been used for more than 6 months. The radiation generator must be restarted by professionals.

1 1) It is forbidden to sit or stand on the conveyor belt.

Baidu encyclopedia-security inspection machine