Sonar is the technique used for detecting the object:
Correct answer: B. Under water
- A. In air
- B. Under water
- C. Underground
- D. On earth
Explanation
Option B is correct.Sonar is a technique used for detecting objects underwater. It uses sound waves to create an image of the underwater environment. Sonar stands for Sound Navigation and Ranging. It is a system that uses sound waves to measure the distance, direction, and speed of objects underwater. Sonar systems use a transmitter to send sound waves underwater. The sound waves travel through the water and reflect off objects, such as fish, boats, and the seabed. The receiver then detects the reflected sound waves and uses them to create an image of the underwater environment.
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About Waves
Progressive waves transfer energy through oscillations, with wavelength, frequency, amplitude and wave speed related by v = fλ; sound speed depends on the medium. Superposition produces interference and stationary waves in strings and organ pipes, while simple harmonic motion describes the oscillation itself and must be distinguished from wave propagation.
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