What radio is made of
Transmitting signals with electromagnetic waves (Popov, Marconi).
- Amplifier — has part. Amplifying a weak signal.
- Oscillator — has part. A carrier frequency oscillator.
- Antenna — has part. An antenna.
- Electromagnetic waves — uses. The signal is carried by electromagnetic waves.
- Morse code — uses. The first radio transmissions were in Morse code.
- Copper — is made of. The wires and coils are copper.