บท 170: Calculators and Radios

Up next, Landon wanted to focus on Radios.

In any society, communication was key.

Be it within the military, schools, police forces, hospitals and so on... communication gadgets were a must within any developed city.

When talking about Radios, there were 2 major factors that come up: frequency and waves (especially Sine waves).

In the modern era, Radio waves control everything.

From the tunes played in cars, to the police radios used for alerting police officers, to the radios within planes....radios waves and frequencies could be seen everywhere.

In fact even cell phones, Televisions, Morse codes, and Walkie Talkies..... use these wave systems.

Making Radios aren't that hard to do.

Back on earth, some people in the wilderness could make them with spoons, wires, coins and an energy source..like batteries.

Essentially, radios send out wave signals... which in turn involve frequency.