The number of vibrations per second is called:
Correct answer: B. Frequency
- A. Time period:
- B. Frequency
- C. Velocity:
- D. Distance:
Explanation
Explanation: The number of vibrations or oscillations per second is called frequency. It is measured in hertz (Hz). The inverse of frequency is the time period (a), which is the time taken for one complete cycle of the vibration.
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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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