String 1 is connected with string 2 . The mass per unit length in string 1 is \( \mu_{1} \) and ...

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String 1 is connected with string 2 . The mass per unit length in string 1 is \( \mu_{1} \) and the mass per unit
\( \mathrm{P} \) length in string 2 is \( 4 \mu_{1} \). The tension in the strings W is T. A travelling wave is coming from the left.
What fraction of the energy in the incident wave goes into string 2 ?
string \( 1 \quad \) string 2
(1) \( 1 / 9 \)
(2) \( 4 / 9 \)
(3) \( 2 / 3 \)
(4) \( 8 / 9 \)
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