The frequency of a wave having wavelength 0.5m while passing a point with speed of 4 m/s is:
Correct answer: D. 8 Hz
- A. 2 Hz
- B. 4 Hz
- C. 6 Hz
- D. 8 Hz
Explanation
From v equal to f times lambda, the frequency is v divided by lambda, which is 4 divided by 0.5, giving 8 Hz. Multiplying the speed by the wavelength instead gives 2 Hz, which is the tempting distractor.
This question appeared on the UHS MDCAT 2026 paper, which you can sit online with every answer explained.
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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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