Part 4/9:
Interspersed with descriptions of machining, the dialogue shifts to technical topics such as frequency allocation in radio communications. The narrator discusses how different bands are used—from military and emergency systems to broadcast radio and satellite communications. They mention the range of frequencies, including 5G around 5 gigahertz and microwave frequencies up to 75 gigahertz emitted by the sun, hinting at interests in electromagnetic spectrum science and its applications.