Question

where metal detectors are used​

Answer 1

Answer:

The metal detector is the most used form of security in airports. A magnetometer uses an electromagnetic field to detect metal objects, such as concealed handguns and knives, but it cannot detect ceramic or plastic weapons.

Answer 2

Metal detectors have been used for diagnostic purposes since 1881. They have been utilised to localise a myriad of foreign objects including bullets, intraocular metallic fragments, swallowed coins and other foreign bodies and medical devices. Rapid detection of metallic objects may facilitate diagnosis or treatment.