If 20 waves pass through the medium in 1 sec with speed of 20ms-1 then wavelength is:
Correct answer: D. 1m
- A. 20m
- B. 2m
- C. 400m
- D. 1m
Explanation
Frequency f = 20 Hz, speed v = 20 m/s, so λ = v/f = 20/20 = 1 m. Thus option D is correct.
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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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