Question

During World War II, the military imaged the seafloor by sending pulses of sound waves down through the water and measuring the time it took for the sound to bounce off the seafloor and return to the receiver. This method is called

Answer 1

Echo

Step-by-step explanation:

The process is called echo. Echo is the sound heard after the reflection of sound wave from a plane surface

Time = total distance traveled (2d) divided be velocity of sound.

One of the application of echo is to determine the depth of as sea bed from a ship

The principles involves sending a sound impulse down into the sea bed and detecting with a receiver the impulse reflected back after striking the sea bed.

Depth of sea bed is given as

D= V×t/2.