If 30 waves per second pass through a medium at a speed of 30 ms-1 then the wavelength is:
Correct answer: B. 1 m
- A. 30 m
- B. 1 m
- C. 15m
- D. 900m
Explanation
Option B is correct.Given data: v=30ms-1, f=30HzFind out: λ=?Solution:The number of waves passing through a point per second in known as frequency. So, f = 30Hzv = fλ λ = v/f = 30/30 = 1m
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About Waves
Progressive waves transfer energy through oscillations, with wavelength, frequency, amplitude and wave speed related by v = fλ; sound speed depends on the medium. Superposition produces interference and stationary waves in strings and organ pipes, while simple harmonic motion describes the oscillation itself and must be distinguished from wave propagation.
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