If 10 waves pass through a denser medium in 1 second with a speed of 10 m/sec, then the wavelength of the wave will be:
Correct answer: B. 1
- A. 0.1
- B. 1
- C. 10
- D. 100
Explanation
If 10 waves pass in 1 second the frequency is 10 Hz, and from v equal to f times lambda, the wavelength is v divided by f, which is 10 divided by 10, so 1 m. Multiplying speed and frequency instead gives 100, the trap option.
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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