What Is The Meaning Of Echo? An echo is a repetition or imitation of sound. When sound waves hit a hard surface they might reflect, making the sound bounce and repeat. … You were frightened when you thought someone was following you, until you realized you were only hearing the echo of your own footsteps.
How Does Sound Propagate Through A Medium? Sound waves need to travel through a medium such as solids, liquids and gases. The sound waves move through each of these mediums by vibrating the molecules in the matter. … This enables sound to travel much faster through a solid than a gas. Sound travels about four
How Do Radio Waves Travel Through Water? An underwater transmitter directs a sonar signal to the water’s surface, causing tiny vibrations that correspond to the 1s and 0s transmitted. Above the surface, a highly sensitive receiver reads these minute disturbances and decodes the sonar signal. Can radio waves travel through sea water? In sea water,