The shortest distance between two points on the wave that have a phase difference of (π/3) is 5 cm. What is its wavelength?
Correct answer: C. 30 cm
- A. 10 cm
- B. 20 cm
- C. 30 cm
- D. 40 cm
Explanation
Phase difference= (2π)/(wavelength) x (distance between the two points) Phase difference = 2π/λ x distance between two points π/3 = 2π/λ x 5 π/3 = 10π/λ 1/3 = 10/λ 3 = λ/10 λ = 30 cm
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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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