Yes, once you check them in and they go off on the conveyor belt, your baggage will be screened by an X-Ray machine and also often with chemical sniffers. If there is any doubt or something suspicious about your bag, a member of security personnel will inspect it by hand.

Once you hand over your bag at the check-in desk, it embarks on a complex, high-speed journey through the Baggage Handling System (BHS). First, a barcode tag is applied, which acts as the bag's "passport." It then disappears behind the scenes onto a conveyor belt where it passes through a multi-stage security screening process, including massive X-ray machines and explosive detection systems. If the system flags a "hot" item, a human agent will manually inspect it. If cleared, the bag is automatically sorted by laser scanners that read the barcode and tip the bag onto a specific "sorter" chute destined for your flight's gate. From there, baggage handlers load the bags into Unit Load Devices (ULDs)—large aluminum containers shaped to fit the airplane’s hull—or onto carts for smaller planes. These are driven to the tarmac and hoisted into the cargo hold. Throughout the flight, your bag sits in a pressurized, temperature-controlled environment directly beneath the passenger cabin. Upon landing, the process reverses: handlers unload the hold, and the bags are placed on a belt that leads back to the terminal’s carousel for you to collect.