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A plane progessive wave of frequency `25 Hz`, amplitude `2.5 xx 10^-5 m` and initial phase zero propagates along the negative x-direction with a velocity of `300 m//s`. At any instant, the phase difference between the oscillations at two points `6 m` apart the line of propagation is _____ and the corresponding amplitude difference is _____ m. |
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Answer» `u = 300 m//s` and `n = 25` `:. lamda = (u)/(n) =(300)/(25) = 12 m` For a path difference of `lamda`, the phase difference is `2 pi`. For a path difference of `6 m`, the phase difference is `(2 pi xx 6)/(lamda) = pi rad` The amplitude is same at both points, hence amplitude different is zero. |
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