Question

SONAR works on the principle of
A. Reflection of sound
B. Reflection of waves
C. Infrasonic waves.
D. All of the above

Answer 1

Hint: SONAR is an abbreviation of Sound Navigation and Ranging. This full form of SONAR tells what is used in the SONAR. Verify other options as well.

Complete step by step answer:
SONAR is an abbreviation of Sound Navigation and Ranging. Thus, the SONAR uses sound waves for exploring the oceans where humans cannot reach. Sound waves used in SONAR are on purpose, the sound waves travel farther depth of the oceans than any other waves.

The SONAR uses the sound of ultrasonic waves that are transmitted through the water and gets reflected at the object in the water. This produces an echo of a wave which is again detected by the SONAR receiver on the base station. Thus, the SONAR principle depends on the echo that is the sound wave.

Therefore, the distance of the object from which the sound wave is reflected can be calculated using the relation between distance, velocity and time.

SONAR does not use Infrasonic wave for its application; therefore, the option (C) is incorrect.

Note:If the time taken by the sound wave to incident on the object and then reflect back to the receiver is t, and we use the distance formula to calculate the distance between the ship and depth of the sea or that object, the distance must be the half of what we get. Because the distance travelled by the echo is twice the distance between the ship and the depth of the sea.