Question

explain the following phenomenonwith respect to principle of echo:

1) the bat during its flight at night

2) dolphin to locate small fishes.

Answer 1

1-Bats are nocturnal and feed at night.They use a method called echolocation to find their way in the dark.Bats emit a sound either through their mouths or their noses which travel outward. When they hit an object or an insect, the sound bounces back to the bat's ears and they can tell how large an object or insect is, and how far away it is.

2-Dolphins hear using echolocation. They produce high pitched sounds in the frequency range of 0.2 to 150 Hz. They hit an object like fish and bounce back giving them the location of object or fish.