A string of linearmass density μ1 is connected smoothly to a string of linearmass density μ2. Find the refection and transmission amplitudes in terms of the mass densities, and independently in terms of the wave velocities. Specifically, find AR(μ1,μ2),AT(μ1,μ2), an also find AR(v1,v2),AT(v1,v2). Formulate the rules of when the reflected wave is phase shifted and when it is not.