China builds massive radio antenna facility

The video discusses a radio antenna covering 3700 square kilometers, as reported by the South China Morning Post. This antenna can emit extremely low frequency (ELF) radio waves ranging from 0.1 to 300 Hertz. These waves can be detected by Chinese military submarines deep in the ocean. Additionally, the antenna has potential applications in detecting earthquakes and minerals.

What is the size of the land where the radio antenna is located?

• 3700 square kilometers

• 5000 square kilometers

• 2500 square kilometers

• 4200 square kilometers

What is the frequency range of the ELF waves emitted by the radio antenna?

• 1 to 1000 Hertz

• 5 to 200 Hertz

• 10 to 500 Hertz

• 0.1 to 300 Hertz

Which military equipment could potentially use the ELF waves?

• Drones

• Chinese military submarines

• Tanks

• Military aircraft

Besides military use, what is another application of the radio antenna?

• Detecting earthquakes

• Weather forecasting

• Satellite communication

• Traffic monitoring

What else can the radio antenna detect apart from earthquakes?

• Forest fires

• Volcanic eruptions

• Minerals

• Tsunamis