While checking with metal detector at the airport, Imran was asked to take out the material from his pant and shirt pockets. Imran got annoyed and argued with airport security asking the reasons for such procedure. He was conveyed that as per security rule, the passengers and their luggage will be checked for security check to ensure safe travel.
(i) What is the value that imparts us in the above scenario ?
(ii) Briefly explain the working principle of a metal detector
