Basic Maths and Units and DimensionsHard

Question

String 1 is connected with string 2. The mass per unit length in string 1 is μ1 and the mass per unit length in string 2 is 4μ1. The tension in the strings is T. A travelling wave is coming from the left. What fractionof the energy in the incident wave goes into string 2 ?
         

Options

A.1/8
B.4/9
C.2/3
D.8/9

Solution

Ar = Ai; v2 =
∴ energy reflected = × energy incident

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