Communicate means to send or receive a message. People can communicate over distances using light and sound in a variety of ways.
To better understand how communication over distances work…
LET’S BREAK IT DOWN!
Light is used to communicate over distances.
Light allows us to see in the dark and it can travel very long distances. An ambulance has flashing lights which communicate to people that there is an emergency and they should get out of the way.
Sound is used to communicate over distances.
Sound is made by vibrations and we hear sound with our ears. Sound can also travel long distances. A police siren is loud to tell people that there is an emergency.
Traffic lights communicate using light.