The distance between two consecutive crests of a travelling wave is 10 cm. If the speed of the wave 50 cm/s, then its frequency would be:
Correct answer: C. 5 Hz
- A. 40 Hz
- B. 1/5 Hz
- C. 5 Hz
- D. 500 Hz
Explanation
Option C is correct since the wavelength of the wave is 10 cm and speed is 50 cm/s. Since V=Frequency x wavelength , F= 50/10 = 5hz
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About Wave Speed
Wave speed is the rate at which a disturbance or wave pattern travels through a medium, given by v = fλ, where f is frequency and λ is wavelength. Questions examine how speed changes between media, the relation among frequency, wavelength and period, and why wave speed is not the same as particle vibration speed.
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