Radio Waves
Q1: What are radio waves?
Answer:
Radio waves are the waves in the electromagnetic spectrum with the highest wavelength. Their wavelength is in the range of 3kHz and 300 GHz. They are widely used for communication purposes.
Q2: Who discovered radio waves?
Answer:
The credit for discovering radio waves goes to Heinrich Hertz who discovered the existence of radio waves in the late 1880s. The complete radio transmission was achieved later by Italian scientist Guglielmo Marconi in the early 1900s.
Q3: How are radio waves produced?
Answer:
Fast-accelerating electrons or sub-atomic particles produce radio waves. They are generated by a radio transmitter and a radio receiver is used to collect these waves.
Q4: What are radio waves, give their two uses.
Answer:
Electromagnetic waves which have the highest wavelength in the electromagnetic spectrum are called radiowaves, they are widely used for the following purposes.
- Radiowaves are widely used for communication purposes.
- They are also used for operating machines remotely such as in Remote control toys.
Q5: Which sphere of Earth’s atmosphere radio waves are transmitted?
Answer:
The layer of Earth’s atmosphere which is used to transmit radio waves are Ionosphere.
Radio Waves
Radio waves are part of the electromagnetic spectrum and waves with one of the largest wavelengths. These waves are used for long-range communication as they are capable of propagating along the curvature of the earth. They are sent using the transmitter and are received using the antenna called the receiver. Radio waves are widely used for long-range communication and they operate in the range of 300 GHz to 3 kHz.