The distance between two consecutive crests of a travelling wave is 10 cm. If the speed of the wave is 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
The equation is given by:v = f \λOn rearranging the equation for frequency, we get,f = v/λPutting values:f = (50 cm/s)/10 cmf = 5 Hz
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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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