A wave passes through a medium, and each particle of the medium performs 100 complete vibrations in 5 seconds. What is the frequency of the wave?
Correct answer: B. 20 Hz
- A. 2 Hz
- B. 20 Hz
- C. 4 Hz
- D. 40 Hz
Explanation
Frequency is the number of cycles/oscillations per second. Therefore f = 100/5 = 20 Hz. Hence Option B is correct.
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About Progressive Waves
Progressive waves transfer energy through a medium or space while particles oscillate about their equilibrium positions. The work includes amplitude, wavelength, frequency, period, phase difference, wave speed and the progressive wave equation, while distinguishing travelling waves from stationary waves, where the pattern has fixed nodes and antinodes.
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