【Daily Question】Theoretical Foundation 2020.05.26
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Multiple-choice question: A plane harmonic wave propagates in the positive direction along the x-axis, with an amplitude of A = 0.02 m, a period of T = 0.5 s, and a wavelength of λ = 100 m. The initial phase of the particle at the origin is ψ = 0. What is the expression for the wave equation? ( ) Answer: B. Hint: Extra rewards will be given to those who can explain the solution process; the answer can be found in the response!
The wave equation for a wave propagating in the positive x-direction is given by: Thus, the wave equation becomes: where A=0.02 m, T=0.5 s, λ=100 m, and φ0=0. Substituting these values yields: y=0.02cos2π(2t-0.01x) (SI units).