Explanation

• On passing through food, X-rays kill the  bacteria
  
• X-rays have been discovered by Wilhelm Conrad Roentgen
• ***

concept of how X-rays kill bacteria while  passing through the food

• The ionizing radiation sends enough energy into the bacterial or mold cells in the food to break chemical bonds.
• This damages the pathogens enough for them to die or no longer multiply, which reduces illness or spoilage.