9. TBQ - Ultrasound wave

Question:

4 m.

Explain how SONAR functions and provide the formula used to calculate distance.

The SONAR is the acronym for .

SONAR is a device that uses through water that after hitting an object. The for the echo to return helps calculate the to the object using the of sound in water. It is used to measure the of underwater objects.

Let us take,

\(v\) - speed of sound through seawater.

\(t\) - the time interval between transmission and reception of the ultrasound.

\(2d\) - total distance travelled by the ultrasound.

Then, by using the formula,

\(Speed\ =\ \frac{Distance}{Time}\)
\(Speed\ =\ \frac{Time}{Distance}\)
\(Speed\ =\ {Distance} \times {frequency}\)
\(Speed\ =\ {Distance} \times {Time}\)

So,

\(Distance\ =\ \frac{Speed}{Frequency}\)
\(Distance\ =\ Speed \times Time\)
\(Distance\ =\ \frac{Speed}{Time}\)
\(Distance\ =\ \frac{Frequency}{Speed}\)

Apply all the terms, we will get the formula to find the total distance travelled by ultrasound.

\(d\ =\ \frac{v}{t}\)
\(2d\ =\ v \times t\)
\(2d\ =\ \frac{v}{t}\)
\(d\ =\ v \times t\)

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