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The speed of a wave in a medium is 760 m/s. If 3600 waves are passing through a point in the medium in 2 min, then their wavelength is

1. 13.8 m
2. 25.3 m
3. 41.5 m
4. 57.2 m

Correct answer: 13.8 m

Solution

The frequency of the wave is calculated as f = (3600 waves) / (2 min × 60 s/min) = 30 Hz. Using the wave speed formula v = fλ, we find the wavelength λ = v / f = 760 m/s / 30 Hz = 25.3 m.

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