Question

Which kind of waves are used to make and receive cell phone calls?

• A. Sound waves
• B. Radio waves
• C. Light waves
• D. None of these

Answer 1

The correct option is B Radio waves

• The basic building block of radio communications is a radio wave. Like waves in a pond, a radio wave is a series of repeating peaks and valleys.
• Radio waves are a type of electromagnetic radiation best-known for their use in communication technologies, such as television, mobile phones and radios.
• It is generated by a transmitter and then detected by a receiver. These devices receive radio waves and convert them to mechanical vibrations in the speaker to create sound waves.