A highly directional beam of ultrasonic wave can be made to travel in water in:
Correct answer: C. several kilometers
- A. many meters
- B. many kilometers
- C. several kilometers
- D. none
Explanation
Ultrasonic waves can indeed be highly directional and travel several kilometers in water. The efficiency of transmission, however, depends on factors like water composition and the specific technology used.
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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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