Question

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

Explanation:

X - rays have the ability to penetrate through non - metallic materials (like the fabric of a suitcase) and are absorbed differently by different materials. Hard objects (which are often denser) will absorb X - rays differently than the surrounding less - dense materials (like clothes in a suitcase), creating an image that can be used to detect the hard object. Infrared is mainly used for detecting heat. Gamma rays are too dangerous and have excessive penetrating power for this common - use detection (like in suitcase screening). Radio waves have very low energy and long wavelengths and cannot effectively detect hard objects inside suitcases as they pass through most materials without significant interaction for such a detection purpose.

Answer:

X - rays