- #1

Shing

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- 1

Suppose I have a string that has completely no motion.

at t=0, I give it energy, two waves.

at t=t'. I see destructive interference from the two waves.

question: At t=0, the net energy must be positive, >0, then at t=t', where is the energy?

(let the waves "meet" at x=L, most of the points at x=L during destructive interference has speed zero, so K.E.=0 , and if all the energy become P.E., then what is the difference to a string without any energy at the first place?)

Thanks for reading :D

at t=0, I give it energy, two waves.

at t=t'. I see destructive interference from the two waves.

question: At t=0, the net energy must be positive, >0, then at t=t', where is the energy?

(let the waves "meet" at x=L, most of the points at x=L during destructive interference has speed zero, so K.E.=0 , and if all the energy become P.E., then what is the difference to a string without any energy at the first place?)

Thanks for reading :D