1amplitude of node = 0 . then k = ∞ ?
In a stationary wave that forms as a result of reflection of waves from an obstacle the ratio of the amplitude at an antinode to the amplitude at node is K. Find the percent of Total Energy reflected.
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8 Answers
71I too did it using the fact how the Amplitudes and the Energy for a wave are related . We have expression for the Amplitude of the reflected wave and from there we can get it.
Did you do the same way or else?
21let wave be x=Asin(wt)
reflected wave=Bsin(wt+Ï€) [B due to loss of energy,Ï€ phase change due to reflection]
therefore eqn. of stationary wave=Asinwt-Bsinwt=(A-B)sin(wt)
Therefore amplitude at node should be 0.