Question

Which of the following is the technique used in ships to calculate the depth of ocean beds?

• A. SONAR
• B. LASER
• C. Reverberation
• D. Sonic boom

Answer 1

The correct option is A

SONAR

Explanation of correct option:

Option A:

1. SONAR: The full form of SONAR is Sound Navigation and Ranging.
2. The SONAR method is also called echo ranging. It is a device that utilizes ultrasonic waves to estimate and measure the distance, direction and speed of objects underwater.

Explanation of incorrect option:

Option B:

1. LASER: A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.
2. Thus this is not the correct option.

Option C:

1. Reverberation: Reverberation is the phenomenon of persistence of sound after it has been stopped as a result of multiple reflections from surfaces such as furniture, people, air, etc. within a closed surface.
2. Thus this is not the correct option.

Option D:

1. Sonic boom: A sonic boom is a thunderous noise caused by compressed moving sound waves. It is generated by an object moving faster than the speed of sound.
2. Hence this is not the correct option.

The correct option is option (A).