Question

multiple choice question
which type of electromagnetic wave could be used to detect hard objects inside closed suitcases?
radio
gamma rays
infrared
x - rays

Explanation:

• Radio waves have long wavelengths and low energy, not suitable for detecting hard objects inside suitcases.
• Gamma rays have very high energy and are mainly used in medical treatment (cancer treatment) and sterilization, not for suitcase inspection.
• Infrared waves are used for thermal imaging (e.g., night - vision goggles, detecting heat sources), not for detecting hard objects inside closed suitcases.
• X - rays have sufficient energy to penetrate non - metallic materials (like suitcase fabric) and are absorbed differently by hard objects (e.g., metals, dense plastics), creating an image that can show the presence of hard objects inside the suitcase.

Answer:

X - rays