Answer: Amateur radio (Ham radio)
Notes: Recently, Indian astronaut Shubhanshu Shukla interacted with students from the International Space Station (ISS) using ham radio. Ham radio, also called amateur radio, is a licensed radio service using radio waves for communication. It is used for education, knowledge sharing, and emergency or SOS communication. It needs a transceiver, antenna, and dedicated frequency operated by licensed ham operators. Communication can be local, global, or in space. In India, anyone above 12 years can use ham radio with a licence from the Ministry of Electronics and Information Technology.
