Question

which of the following concepts is used in SONAR to find the depth in ocean
a. larser b.echoes c.musical sound d.noise
please tell
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Answer 1

Explanation:

b) echoes is the answer.

Answer 2

The principle used in Sonar to find the depth in ocean is ECHOES.

Detailed Discussion:

• Lets say there is a ship which wants to measure the depth of the ocean floor.

• So, the emitter portion of the SONAR will emit a sound wave of a particular frequency towards the ocean floor.

• Now , the wave will propagate towards the ocean floor and will get reflected from the floor and be directed towards the ship.

• This time the wave will propagate upwards and then will be taken up by the receiver portion of the SONAR.

• The time taken by the wave to reach that to the ship will help to determine the depth of the ocean.

Depth is calculated as follows:

$\boxed{ \bf \therefore \: d = velocity \times \dfrac{time}{2} }$