Wavelength of a travelling wave is 20 cm. What is the phase angle between the two points separated through a distance of 25 cm?
Correct answer: B. 2.5π
- A. 2π
- B. 2.5π
- C. 3π
- D. 1π
Explanation
λ= 20cm = 0.2 mΦ= ?Δd = 25 cm = 0.25 mΦ= kΔd k is wave number [ k = 2π/λ]Φ=2π/λΔd= 2π/0.2 *0.25 = 2.5 π
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About Progressive Waves
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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