The phase angle between two points in a medium is 3π/4. If the distance between these points is 20 cm, then the wavelength of the wave is?
Correct answer: A. 8/15 m
- A. 8/15 m
- B. 15/8 m
- C. 8/15 cm
- D. 15/8 cm
Explanation
Given that; Phase angle = ∆Φ = 3π/4. ∆d = 20 cm which is 0.2m, ∆Φ = k∆d, where k is wave number k = 2π/λ. ∆Φ = (2π/λ)(∆d). Making lambda the subject, λ = (2π/∆Φ)(∆d). λ = (2πx0.2) ÷ 3π/4. λ = "8/15m".
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Progressive waves transfer energy through a medium or space while particles oscillate about their equilibrium positions. The work includes amplitude, wavelength, frequency, period, phase difference, wave speed and the progressive wave equation, while distinguishing travelling waves from stationary waves, where the pattern has fixed nodes and antinodes.
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